Malicious PDF — malware analysis report

Static analysis result for SHA-256 702def0b8c1a0c65…

MALICIOUS

PDF

42.3 KB Created: 2020-08-13 18:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6207e1cf2ea398e66bf0de543efbf013 SHA-1: fd05abee2395fb5d036a25bedcc98de25f1fe7f2 SHA-256: 702def0b8c1a0c6504c179fb7ecc88ff5177b18292a9f692073bffd7bdd1e928
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many pointing to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/wb?keyword=aerospike%20database%20a%20complete%20guide%20pdf, which likely serves as the primary malicious entry point. 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/wb?keyword=aerospike%20database%20a%20complete%20guide%20pdf
    • http://zireb.thebookboyfriend.net/uploads/1/3/1/3/131382243/sudejokutowawatugoz.pdf
    • http://sapepibik.michaelrmentele.com/uploads/1/3/1/1/131163658/6077671.pdf
    • http://files.foleykiwanisclub.com/uploads/1/3/1/4/131408415/1918578.pdf
    • http://nozij.greenplanetrainbarrels.com/uploads/1/3/2/8/132816066/fanipirunag.pdf
    • http://files.modesttransitions.com/uploads/1/3/2/6/132695438/fb1f44a1260f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/80177222193.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/public_administration_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/interventional_cardiology_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/20407189258.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/berdyaev_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/bipijozevanegesemojedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/lozelom.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/90193330033.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/rivutuxikusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/legetepiran.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6835/files/aerobic_endurance_training_improves_soccer_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/zurasabavitiwozaser.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/66191770857.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/revised_auto_rickshaw_fare_chart_in_delhi_2020.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_off000063a4.bin
4da886c70a00b5aff86a4eaf75322d60d50f3bee1976763bb1798107d82a9b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 5668 bytes
font_01_sfnt_off000076d4.bin
f83ce1b63e0d2c828a985267369b1d7f74ce7e8e5249746a6e4e782997f2688c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 10904 bytes

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