Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e804333644cc05f…

MALICIOUS

PDF

46.2 KB Created: 2020-09-12 00:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56861312b23426d824253e6e7066b652 SHA-1: 2ee6e10e2ad48848aaafc353706613653cf25278 SHA-256: 5e804333644cc05fbf488db07b10cddb4e205d20d5c00e6488ad2dbce5c780cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body text, though partially corrupted, includes a URL that appears to be part of an SEO poisoning or phishing lure. The presence of a large number of external PDF links suggests an attempt to distribute malicious content or engage in link farming.

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.link/wix?keyword=baahubali+part+1+tamil+movie+hd
    • http://files.hartsmillproject.org/uploads/1/3/0/8/130874474/2823239.pdf
    • http://files.liswimming.com/uploads/1/3/0/7/130739348/mipogax-jasetavagimoj-difazelililuvo.pdf
    • http://files.hopecolette.com/uploads/1/3/1/4/131438299/kaxepagu.pdf
    • http://files.msuasa.com/uploads/1/3/2/7/132712207/jolamip.pdf
    • http://files.mystarsandstripes.com/uploads/1/3/2/7/132740399/gugimirovomuk-fawilizifajuf-nejaviditaxina-rapezadato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d2759c_6230099ecc674705b0ba90a483be891d.pdf
    • https://static.usrfiles.com/ugd/e6e573_767c803336e749debde345b61c6b712e.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/3144739782.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/mcq_biostatistics_in_public_health.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/casiopea_mint_jams.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/12914746312.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/76682170338.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_off00006889.bin
3208a4b490a266b613cea58b68ef2fa4d2222743aa851d5676cd1f1dcc377c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 5324 bytes
font_01_sfnt_off00007a7b.bin
d25e4e86ec88d0e78f3961ce32229ca5e689071dd2a761c70ad655d6158bfce2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 16080 bytes