Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d38a5a3c137d49e…

MALICIOUS

PDF

33.3 KB Created: 2020-08-04 13:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 811e8e6e098550e3097497f9d86c286b SHA-1: f46d4e43c61f0759b846e037957d8c4165ad7b54 SHA-256: 7d38a5a3c137d49e51ddb3deb5bd0383c0ab6e401236c8e2c6f0a4935e5a5805
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content farms. The primary malicious link identified is https://ttraff.com/pify?keyword=colloquial+english+gareth+king+pdf, which is flagged as a known malicious redirector. The document's structure suggests an attempt to distribute a large number of links, likely for SEO manipulation or to host malicious payloads, aligning with a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=colloquial+english+gareth+king+pdf
    • http://files.shopthrillvintage.com/uploads/1/3/1/8/131871535/3709026.pdf
    • http://files.crewsheatingandcooling.com/uploads/1/3/0/8/130874160/lanabazelirevapopi.pdf
    • http://files.libertylifeyoga.com/uploads/1/3/0/9/130969446/d239da.pdf
    • http://files.wmswolvesband.com/uploads/1/3/1/1/131164198/padixagemuzun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/dolikesudufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/41426446673.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/bewazofaxitanerasijarudem.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/writing_numerical_expressions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/57618422515.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/pejiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9689/0785/files/43705376684.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/tidefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8060/files/millisecond_to_hours.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/mugeded.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32505595602.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/zedoserejizejowe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000455e.bin
a119dab2e4c2b2b6632e1ee78f0866ed09238cd831683b3f6841c39c1f4d7221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x455E 5400 bytes
font_01_sfnt_off000057a9.bin
4c27c92aae7a6ebfea0d615640166cbe0cb9ea4efe028e0ed07026b09da7dea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A9 9516 bytes

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