Malicious PDF — malware analysis report

Static analysis result for SHA-256 856354b515cc4448…

MALICIOUS

PDF

40.1 KB Created: 2020-08-27 19:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d902e480261d8ade12e5fc533c9343e SHA-1: 223a8620b22193494d10c017976e12a13f20fd7f SHA-256: 856354b515cc4448dd3622db4cc7ce008d8cc79912ba59164628204b83d8f2ae
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high number of embedded links, many of which lead to a known malicious redirector. The document body contains text related to 'Lincoln town car manual transmission' and includes the malicious URL, suggesting a lure for a phishing or scam campaign. While no scripts were explicitly extracted, the presence of numerous links and the ML classifier output strongly indicate malicious intent.

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=lincoln+town+car+manual+transmission
    • http://jesazijam.molecularbliss.com/uploads/1/3/1/4/131453501/xawilajafij_nibulofebuxade_gedegujudug_sogisesu.pdf
    • http://files.goodlyframe.org/uploads/1/3/1/4/131483148/1a2b5c.pdf
    • http://mutejavo.yellowbarnwholesale.com/uploads/1/3/2/6/132681946/fomunitotonoje_gemedudozono_jikurubivibizag_lopos.pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/map_of_continents_and_countries.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/ffmpeg_subtitle_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/7134/7619/files/baba_balak_nath_chalisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4321/6789/files/copy_google_sheet_to_another_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/ctet_2020_question_paper_paper_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/3315/6001/files/snakes_and_ladders_blank_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/13754871010.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/lozodevofinokewurokizaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/3007862590.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/46141855840.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_off000061d3.bin
d73cc9a81fa33c2a7890b45e2664acd7bd5336a9e72e8de7e2b5cfbd66144f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 4976 bytes
font_01_sfnt_off000072af.bin
2dae72f0aeee175758cd523609d6ff50bb5c469f19fbeeb749c13fc8cd3f7b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AF 9800 bytes

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