Malicious PDF — malware analysis report

Static analysis result for SHA-256 73acef2294611855…

MALICIOUS

PDF

45.3 KB Created: 2020-08-21 03:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a4051e372dc521802d661015ec28dae SHA-1: b3162ad54a79bd9e39002a1249ed261c8bf494f3 SHA-256: 73acef22946118558dfcdeaa4464bc01d1cde20ade871d5c5317bce712006404
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.com/pify?keyword=cars+3+full+movie++hd+popcorns', is flagged as a malicious redirector, indicating the document's intent to lead users to harmful sites. The ML classifier also strongly indicated maliciousness.

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=cars+3+full+movie++hd+popcorns
    • http://vazumox.mollydogdesigns.com/uploads/1/3/2/3/132303382/xujatoganuge.pdf
    • http://files.xtremepaintbody.com/uploads/1/3/1/4/131409574/5723286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/marumolazeki.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/kagolanaropoxuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/29726621508.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/59058769334.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/jotalerexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/pipetepofape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/agents_of_socialization_definition.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/contrato_de_arrendamiento_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0434/4922/1286/files/gonizinuzodugat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/dexusazige.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5558/files/el_abismo_seth_godin.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/vivapefedaxamikugixi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006376.bin
fa921a2ddf079e13834def54339004012342c96832066a40ba6069ef39cdd5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 5444 bytes
font_01_sfnt_off000075d8.bin
3007d47a93ad3d52d40589962c73321cb45d13f5b683624d4ccf85c53a7b55d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 10676 bytes
font_02_sfnt_off00009a55.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A55 4324 bytes

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