Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fd93c89f48879f…

MALICIOUS

PDF

52.8 KB Created: 2020-08-19 00:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 974cf860acaf8de60da037c695ceadee SHA-1: 4312cd22a89e5afbc7ba7c47f27977a0dca28f62 SHA-256: f4fd93c89f48879f86fb0add1815ae6ed84ef6c773b0a1bd99fb610251c19020
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector. The document body contains obfuscated text and the URL itself, which points to a redirector service. This suggests the primary intent is to lure the user to a malicious destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=bijli+ki+taar+hai+song++bestwap In PDF document text
    • http://files.bordencreeklabradors.com/uploads/1/3/1/3/131383541/jevulegujejin-ritumejo.pdfIn PDF document text
    • http://files.northridgetennisacademy.org/uploads/1/3/1/3/131384401/e1093b644a1aba.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/1/0432/1627/3563/files/22488511407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/worx_14_inch_chainsaw_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/proyecto_de_investigacion_de_mercado_ejemplo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/carcel_de_amor_carol_marinelli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/tenis_beira_rio_preto_plataforma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5127/7726/files/fepasuxepapolez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/78288006029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/jipijerudovewamekuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/a_prayer_for_owen_meany.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/fire_meet_gasoline_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/wetekixoxeloroxenevaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/perimeter_of_2d_shapes_worksheet_tes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/neurofibromatosis_type_1.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 5500 bytes
SHA-256: 527a1e8735a567bfaf64c0fe1e0544649a0a2656313bcb03dcbb1763ce386d98
font_01_sfnt_off000073da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DA 15056 bytes
SHA-256: 6e04526df4af473519536a327edb43a08391c6c20aea0c5eadc4125f06572c87
font_02_sfnt_off0000a311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA311 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off0000b87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87C 3568 bytes
SHA-256: f51e20e5af10a81ad61e59b12de09fdbadab061292b4969b69a17c45de2fe45e