Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33c722fcaedd2ae…

MALICIOUS

PDF

82.0 KB Created: 2020-08-08 14:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f17edefde51430d672196395965b24bf SHA-1: f6790edd100d6b17700222a79ae8d1825dab6bc8 SHA-256: a33c722fcaedd2ae2dadee56969ed7492e8acb255b2ace94ec961412ef597fca
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=millennium+development+goals+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=millennium+development+goals+pdf
    • http://files.dummart.org/uploads/1/3/2/6/132682739/3d9f80174fd.pdf
    • http://files.nataliesegall.com/uploads/1/3/1/4/131407012/401454a6f8b.pdf
    • http://jarubaz.nvnatalie.com/uploads/1/3/1/4/131407406/c72ec9e7e4a.pdf
    • http://lowaf.heatherrafia.com/uploads/1/3/0/7/130776485/59173.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/81568733490.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/50015136174.pdf
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/74091703738.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/biological_classification_allen_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4845/8647/files/the_5th_wave_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/tumetiwozuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/mastoiditis_akut_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/84833977861.pdf
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/sippin_on_some_sizzurp_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/ceramics_monthly_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/81524337946.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/megafatuzevotalulegituf.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010318.bin
fbc45dab556f9bec5baeacbeec339c89893aa548499b861515584e4dcce83644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 5328 bytes
font_01_sfnt_off00011540.bin
3f1ac874e726f624f33532b1a2ba23798107077c0954e994af65453c3f4218be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 10800 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.