Malicious PDF — malware analysis report

Static analysis result for SHA-256 67510a9b8ae4b3ec…

MALICIOUS

PDF

34.1 KB Created: 2020-08-17 10:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0128d0a10cdd189c5628b737dc1d9ee0 SHA-1: c05795105856d8171ee8110337752e0f820ce806 SHA-256: 67510a9b8ae4b3eccad6ec18f57a250de6a27083118b30e754027a41ce4d3bd3
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical finding indicates a direct link to a known malicious redirector, ttraff.cc, which is used to disguise the ultimate destination. The document body also contains a 'download' lure, reinforcing the malicious intent. While no scripts were extracted, the presence of a malicious redirector and a link farm strongly suggests a phishing or malware distribution attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=microsoft+sql+server+2017++for+windows
    • http://xuton.lewisburglighthouse.com/uploads/1/3/1/4/131438640/rafowemodobukel-gamisomanuxu-wudijalizit-jifemimilibe.pdf
    • http://files.scsoutherncrossfarm.com/uploads/1/3/0/7/130775267/30530a1ebd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/dusulimosofebuxugikaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/sanford_guide_to_antimicrobial_therapy_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/65967134560.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/contrato_administrativo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/fefatazigolowezelofulo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/navolefowonebudusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0817/1925/files/33403467545.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/dolojekoxadonaluxugufud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/rumive.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_off00004770.bin
5ef8abd78b781d7d1a79b9ac65f600df467b59a5dabdee4e93929959f17cda32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4770 5492 bytes
font_01_sfnt_off00005a5b.bin
998f33b643153bbbb59bfef6d976f817b8faed9c5485d5113974fc843a7150a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5B 9760 bytes

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