Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5cd0f77640a0d3…

MALICIOUS

PDF

64.6 KB Created: 2020-08-09 14:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 673244055e03a5e6e3067bc94ab09697 SHA-1: 3759f8856ebb4d772be2c59b46794b047d59a615 SHA-256: 3f5cd0f77640a0d35939316753821ddaf772f07275637dab8e19415734ad154c
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially garbled, includes text suggesting it is disguised as educational material. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.com/pify?keyword=alkanes+and+alkenes+notes+pdf In PDF document text
    • http://files.magicbenyoung.com/uploads/1/3/2/6/132682342/filoduxalati-woxetogoligilo-rufegorodixes.pdfIn PDF document text
    • http://files.northfieldrobotics.com/uploads/1/3/1/8/131871730/f70cef8d3f0c9c.pdfIn PDF document text
    • http://files.keya-tshirt.com/uploads/1/3/2/6/132682051/dozajesapujeg_zereza_rotutos_tonemitadubifa.pdfIn PDF document text
    • http://files.lovingbackyardsquirrels.com/uploads/1/3/2/7/132741334/zozosuderenive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/julojimonewojovamebewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/kobitaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/human_anatomy_9th_edition_marieb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/87481009476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/space_engineers_split_stack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/zatiwotewenaxovokad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/understanding_renewable_energy_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/suxixebotod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/bupas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCA 4992 bytes
SHA-256: 2f71dc7c2e1111ad23bb9d95bca44ff892d2128d5ad63d21b1c95b1613081303
font_01_sfnt_off0000bcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDF 10336 bytes
SHA-256: 8bda3a81e271ad3a6c292a5ea670db36ef27e362f031ed520f10b1fb97fd7bed
font_02_sfnt_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 16080 bytes
SHA-256: 01918ab328aad74c9e8f640f01f786fd0c2e0e9f3673bd8045474dd117871356

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