Malicious PDF — malware analysis report

Static analysis result for SHA-256 3137f452d172951e…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 19:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 204e2fb2e96c3545ebb132d1ec9e9104 SHA-1: bc931891f1d1473b2e586ac41dbb227f29493a33 SHA-256: 3137f452d172951efeb99241edfbb0cef13bc7d279c4ffa6cf31a93574f94cd3
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific URL pointing to a redirector, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other links that appear to be part of a link farm designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=acids+and+bases+worksheet+ks3 In PDF document text
    • http://namojoze.fountainoflifeministrieshavelock.org/uploads/1/3/1/4/131483627/xabanuzu.pdfIn PDF document text
    • http://files.cpccedu271.org/uploads/1/3/0/7/130775084/2055206.pdfIn PDF document text
    • http://files.twinflamepsychic1111.co.uk/uploads/1/3/1/6/131636984/6324394.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7711/8625/files/chomage_en_cas_de_demission_pour_formation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3309/9430/files/besanukudaturasov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2893/0979/files/43217641528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/dirugafidel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/36202094270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/alpha_helix_vs_beta_sheet_amino_acids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/pikuvuguwalujovajaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/23786838055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/87035722516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/kamudowedilejuvonuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/85968744064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/zupome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/biology_letters_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0725/4439/files/15781109941.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D28 5232 bytes
SHA-256: 51ae8c3ca8aceeb00a942b77d2d000e6d7eed483f46a553ad5c68d9e618d9988
font_01_sfnt_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 9976 bytes
SHA-256: 8ca52e24022c06398e27c1a1bdb74187bda248ed7e14fa8a983abfad3b22754c
font_02_sfnt_off00008132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 16088 bytes
SHA-256: b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e
font_03_sfnt_off000095f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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