Malicious PDF — malware analysis report

Static analysis result for SHA-256 86336b078db14a4b…

MALICIOUS

PDF

33.8 KB Created: 2020-08-25 08:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf3234fa3bbed6395ff8fde5651eedd SHA-1: ef4cae8dcb76305d79bc50071cfee60d97a46b3f SHA-256: 86336b078db14a4baa25076547d98d2bd22299ea9714c0642751d5b3beb42b3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/pify?keyword=growing+geometric+patterns+worksheet', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious or unwanted content, aligning with spearphishing or malicious redirection tactics.

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=growing+geometric+patterns+worksheet
    • http://files.thetrophyshopplus.com/uploads/1/3/1/6/131606494/ramubijakovixekikef.pdf
    • http://files.lowerywelding.com/uploads/1/3/1/6/131636841/4146978.pdf
    • http://files.shendramaclub.com/uploads/1/3/0/8/130813428/mezafipuloxajuw-viwaxikivopiwu.pdf
    • http://vobubuduz.tremaynesolar.com/uploads/1/3/0/8/130874218/5cf8bff7b14189b.pdf
    • http://pujavo.fiawashburn.org/uploads/1/3/1/8/131856917/4812025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/barbie_fairytopia_movie.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/49021172956.pdf
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/nella_forma_pi_appropriata_in_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/79565537276.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/93234724966.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/46280718566.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/48337971146.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/arduino_uno_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/vector_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/0718/7872/files/bsc_physics_question_papers.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_off00004837.bin
65abc9b1633a18cd6a4e5c17d4f4ca3c33a0ca2ca088bc420a3fbb730ab014da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4837 5504 bytes
font_01_sfnt_off00005add.bin
2e48c22ee4e229e5d6605eea86ca1c8097f44e1661a4312db0b7b7744e30a667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADD 9236 bytes

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