Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b46d946cd22ac9…

MALICIOUS

PDF

41.1 KB Created: 2020-08-06 19:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bce466bdd30066dc74fb43769ce5c86 SHA-1: b37b77ba8da67b9f0b1287b14e13308a98f361fb SHA-256: 60b46d946cd22ac933f3c5648603f191a8e793eb1ddc5e06b7d9a7a1b54853f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of embedded external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of the redirector suggests an attempt to lead the user to malicious content or a phishing page. The document body text is heavily obfuscated and contains the primary malicious URL.

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=anatomy+of+head+and+neck+pdf
    • http://nolor.lcpcpc.net/uploads/1/3/0/8/130874474/97d6882a2d.pdf
    • http://files.yalenotredamelaw.com/uploads/1/3/1/1/131163959/a519763482d30.pdf
    • http://files.silverliningdesigns.co/uploads/1/3/2/3/132302871/3df6263731a0d57.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/kaxuxetapabebezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/26386520593.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/68984382167.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/pudujepupikipigizufode.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/swift_carrot_botw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4849/3475/files/emilio_alonzo_brigadio.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/584178787.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/bilafinexumewiwiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/37783327371.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/notiwuwozuw.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/difference_between_organic_and_inorganic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/ray_j_height.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/learn_french_by_podcast_lesson_1.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_off000062a3.bin
273f6fe87bc2fe28d85416dc56b52a582899dbaca73f94b511b8e6b3a39a1f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A3 5244 bytes
font_01_sfnt_off00007469.bin
c05d39fd173d7114b36b2702e3fb3e82640b8456f950e3fe5f2e3362e796edb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 10348 bytes

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