Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43720f5fe427c86…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 16:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f5e167c52efaa8218471858624a5167 SHA-1: 6810a806ec881a7c017004929ee917b4e6f22c17 SHA-256: a43720f5fe427c86c89d0ee978f5980427c290687defad561dcf72ef2c086c00
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to obscure the final malicious destination. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to an 'answer key'. No scripts were extracted, but the presence of a malicious redirector and link farm strongly indicates a phishing or malware delivery attempt.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=mpsc+sti+pre+2017+answer+key In PDF document text
    • http://files.cotuithistoricalsociety.org/uploads/1/3/2/7/132710763/c7d8c22042.pdfIn PDF document text
    • http://files.burntchef.com/uploads/1/3/1/3/131383959/ruxafivumebipajum.pdfIn PDF document text
    • http://files.thelifelinechurch.org/uploads/1/3/0/7/130740069/8181346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/formal_business_letter_sample_complaint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/68237229769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/43084845051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/30358059401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9108/6750/files/basic_chemistry_timberlake_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/50605010046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5725/6350/files/wodipugumevizodoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/bosch_integrated_dishwasher_smv40c30gb_manual.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBA 5564 bytes
SHA-256: fbd7ce96809273ca86a8c52a5edd29c941cc74cd61040fa4d54432f3d8d2629f
font_01_sfnt_off00006ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 10216 bytes
SHA-256: b9675ca59936f4ff081d9d866622d22b84122670059ab1995ae20276ac299682
font_02_sfnt_off000091df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DF 7752 bytes
SHA-256: 7468a2359114728a3f55bcb1fdc4d3a9f5764ca3a6552804d1e560286436b985

Open this report in the interactive analyzer, or submit your own file for analysis.