Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b179e1979ed349…

MALICIOUS

PDF

34.7 KB Created: 2020-08-07 23:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c32301e9b16800caf3c87d1853fc123 SHA-1: aff192cc46949e3bf411d7ddb1a0b9f02fb86cd0 SHA-256: 04b179e1979ed3499fa641b76af8ec0bf789b11eaa22500ee9c361997037abde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to obscure the true malicious destination. The ML classifier strongly supports the malicious verdict, indicating a high likelihood of user redirection to a harmful site.

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.ru/pify?keyword=assemblies+of+god+ministers+manual+pdf
    • http://files.madisondphil.org/uploads/1/3/1/4/131437711/xupodip_rewagegerijuwum_zakitese_lodifomok.pdf
    • http://files.mainstreetmusiclessons.com/uploads/1/3/0/9/130969356/3a3d8220d4f6b.pdf
    • http://files.wrestlingdoneright.com/uploads/1/3/2/8/132814168/mazowixipiz-rafile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/51757391923.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/fakilibum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/widusorifajuvigumijemopof.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/mapebasizew.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/wixofutodaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/cpr_procedure_steps.pdf
    • https://cdn.shopify.com/s/files/1/0452/7154/8066/files/catlogo_jequiti_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/concepto_de_analisis_financiero.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/gafijiforozamiturepovi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/96554645835.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/comment_assembler_plusieurs_en_un_seul_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/gorokubugifeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/zuxuzuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/bonnie_and_clyde_lyrics.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_off000046dd.bin
f603283f1c6147d592801d79cf88a275e40069975de358c8918858590171a484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DD 5492 bytes
font_01_sfnt_off0000596c.bin
e7eb55a1888bcc36514db5c0afea3a5ab04a63a2ca6e5c9fd551120baf5ba012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596C 10684 bytes

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