Malicious PDF — malware analysis report

Static analysis result for SHA-256 6069fc80cb4e5d70…

MALICIOUS

PDF

33.2 KB Created: 2020-08-22 02:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fbcf36711c5aa0717d934ada0568dd8 SHA-1: a43f9a053e4ce09448864d6645f12a6a9b1ba863 SHA-256: 6069fc80cb4e5d70041b14ea944a27872661c199840dded8cf5faa7494b2e531
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 of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=mera+bhola+hai+bhandari+video++hd', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its importance in the attack. The presence of numerous Shopify-hosted PDF links, some flagged as benign, might be an attempt to camouflage the malicious redirector among legitimate-looking resources.

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=mera+bhola+hai+bhandari+video++hd
    • http://files.sassysewingandembroidery.com/uploads/1/3/0/7/130776275/xugolexog.pdf
    • http://files.genesysdayz.com/uploads/1/3/1/4/131453335/zatag.pdf
    • http://files.eastsidepearl.org/uploads/1/3/1/8/131871657/buzisenijigam_gidovek_goridijif_miwudotumunoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/obs_discord_overlay.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/guzinutikifiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/xajixupopejefebujex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/zezeluxoxuwelitex.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/bikolesenewizolemadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/kakazovarixefozinizivir.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/82361398487.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/vizadujewinalewuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/gexabiduzabeburajumodonon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/70023499868.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajomuxufukurojudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/61296092564.pdf
    • https://cdn.shopify.com/s/files/1/0444/4851/4215/files/himnario_cantos_del_camino.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_off00004695.bin
409efffba634f0bc1f2a8ee9d3979a231c02df523b33656dded716f0bb7c12b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4695 4940 bytes
font_01_sfnt_off0000575f.bin
4fc0e95545196013ba55ef9df91574f1845369f34d3da3cba407378b63fa9631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575F 9516 bytes

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