Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba99b80b76eba18…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 15:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0233ab2842309ed2db491d809bfe1cd7 SHA-1: 757080e46c3126d82a6a9c3335bc505d7e50aa50 SHA-256: 0ba99b80b76eba18ddc10d027827e8d10105d08aa28cc72b5ec7c730cd5ef634
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=tutorial+de+wondershare+filmora+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many pointing to benign Shopify domains, indicates a potential SEO poisoning or link farm tactic to obscure the malicious redirector.

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.com/pify?keyword=tutorial+de+wondershare+filmora+pdf
    • http://wopome.albertawildapparel.ca/uploads/1/3/1/8/131856772/namomevevavot.pdf
    • http://vavuruvam.hugotonassembly.com/uploads/1/3/1/3/131398009/deviropabevawowuted.pdf
    • http://files.barriefirstaid.com/uploads/1/3/1/3/131380558/e2d3b65f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/e2_80_9cyardstick_e2_80_9d_policy.pdf
    • https://cdn.shopify.com/s/files/1/0435/1633/0152/files/vuzokevupikifezero.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/lobigajixitejisajawufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/2142314682.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/setal.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/vsphere_6._5_u3.pdf
    • https://cdn.shopify.com/s/files/1/0434/6537/5908/files/rmarkdown_font_size.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/kideruxopenimuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/assassin_s_creed_syndicate_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/15910800463.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/tufimilarales.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/ziwexemakisoxid.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005692.bin
62a87ef7002d10550713bd136745725c48d3a688935f524bea46a7e8821db866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5692 5324 bytes
font_01_sfnt_off00006890.bin
7ef395b5a5a4a696d6b318fa6272f9f6931772ea0c8d574b68d622f413488ea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 10776 bytes
font_02_sfnt_off00008d5b.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5B 16036 bytes

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