Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e378a3a978724af…

MALICIOUS

PDF

45.8 KB Created: 2020-07-30 07:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8fcf0422e57c20bf2e438c1b2d5762c SHA-1: 3a0bc50646ccb0c6e3de53ddb69f0be53545be8d SHA-256: 0e378a3a978724af8885b2befab5e09cf59a34171169757ff1486461825d350c
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to known malicious redirector infrastructure and a high ML classifier score. The document body, though heavily obfuscated, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, strongly suggests an advance-fee fraud scheme. The primary IOC is the malicious redirector URL used to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=the+platform+history+book+pdf
    • http://files.susanbrumfieldmusic.com/uploads/1/3/1/6/131637307/batekutujago_sunaxegasip_jugogilubor.pdf
    • http://files.sacsheldonffa.com/uploads/1/3/1/0/131070911/jumopu_disoxeruvob.pdf
    • http://files.ufloriaorganics.com/uploads/1/3/1/4/131437669/navejunozaseg_jeximeson_jewuvimok.pdf
    • http://files.bcovolleyball.ca/uploads/1/3/0/7/130739265/batoduketelerig-baweli-kuridupur.pdf
    • http://files.sylverdesign.com/uploads/1/3/1/4/131453267/7850112.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/67615163797.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/45109780784.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/70364496717.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/88198334532.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/kadarigurawekituzeguf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/vowekobufonovevugufugavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/xidolanuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/14539800426.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/90395602415.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/wexirewemofidulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/82726202836.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6194/files/rijum.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/damumizezinujetudoga.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_off00007557.bin
6ea8ba860e12d7df7d338a5f8c4fdbe7f76cbcba8b63410af91929b42ce59690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 5216 bytes
font_01_sfnt_off00008719.bin
19fa3feb04f9b4117f076d7ff7a0efd758ff25322e78edc2707c88ae20be8b63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 10156 bytes

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