Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd112053e8c433b9…

MALICIOUS

PDF

60.6 KB Created: 2020-11-03 17:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c704cc87537fd7075c227317a619fa SHA-1: 5d5aaf1a696a55bb74fb21a67afbba60dc5ae20a SHA-256: fd112053e8c433b95677668685dad0549c5c10d7904c6208fe9bcf9007cd174b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary URL, 'https://gettraff.ru/123?keyword=p3+social+links', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other links, suggesting an attempt to drive traffic to malicious sites, likely for SEO spam or phishing purposes. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://gettraff.ru/123?keyword=p3+social+links
    • https://cdn-cms.f-static.net/uploads/4447437/normal_5f9f00361d740.pdf
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f90d8b981775.pdf
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/fejumafojowobo-bumawe-ledebekogabeji.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f9a142633e1b.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/munedivuwalam.pdf
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f93a852eed94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mavixu/new_survival_games_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/bf33968e-9aef-43cc-9eb5-6c67df13d237/tour_guide_di_hatyai.pdf
    • https://uploads.strikinglycdn.com/files/fdd35c65-6151-4403-a4fe-f6d52cdc845e/dususewi.pdf
    • https://s3.amazonaws.com/padoragog/ipush_app_apk.pdf
    • https://s3.amazonaws.com/rezugekolaba/53672636669.pdf
    • https://s3.amazonaws.com/lokijuronig/fogokop.pdf
    • https://s3.amazonaws.com/juzinaramip/cornelius_brothers_and_sister_rose_album.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_off0000af0a.bin
ed44c1ee48082d9fea0135f0a41daf16e399347cde94c40553f9811fef611055
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0A 4928 bytes
font_01_sfnt_off0000bfe2.bin
c208dfc2d231ecba76f7cc7f68aa6306f0d992be23095e2dcd6a6f88f500240e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 11244 bytes