Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a9f901c9e619c2…

MALICIOUS

PDF

61.1 KB Created: 2020-08-10 19:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78a9df31b9171f89554d8ca143227b53 SHA-1: 5f670e043aec72d595c17bf8810a21c412444d51 SHA-256: 04a9f901c9e619c274fe26fdfac0577157b2672dce02ee6bb0e60ad74d178146
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a primary link to `https://ttraff.ru/pify?keyword=arquitectura+gotica+en+alemania+pdf`, which is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of a malicious link farm designed to distribute further malicious content. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or redirection attempt.

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=arquitectura+gotica+en+alemania+pdf
    • http://files.needlenahaystack.shop/uploads/1/3/1/3/131384468/8117288.pdf
    • http://files.thehenrysplantfarmonline.com/uploads/1/3/2/8/132814930/fowuvitedafopan-jorapepawe-bazax.pdf
    • http://toxupuz.youthfulnest.com/uploads/1/3/1/4/131453541/woguzagozifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/73246913985.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/commbank_home_loan_rates.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/twitter_background_size.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/63058123949.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/97545570399.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/rapemerimasufinawunuwiget.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/possessive_pronouns_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/deduruwutup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/act_not_parsing.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/pufuziwafobisobama.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/38382714532.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/bolt_head_marking_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4925/files/90517572399.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/rugofototadekodeni.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_off0000afa5.bin
6025e61ce00bbad0194ad3a273c59f670d1360f6186280cbf04712f0edc6eb41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA5 5412 bytes
font_01_sfnt_off0000c1ef.bin
ebe0e733fc7bda7c83f6790b49064a8cdd2c15c1116039ce71223268240c7963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EF 11024 bytes

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