Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7370db3d21084ac…

MALICIOUS

PDF

42.8 KB Created: 2020-08-22 00:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df9932f94917bc9205d4568f52f9e981 SHA-1: be40500db7d4630ef6ee3f72e5c43793956badc1 SHA-256: c7370db3d21084ac186d3343ceee42a68a07647880c8fa976af7f2a046bbfccc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=kia+cerato+2012+manual+consumo`. This link is likely intended to redirect users to a malicious site, possibly for phishing or malware distribution. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

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=kia+cerato+2012+manual+consumo
    • http://tewugemep.smithtaekwondo.com/uploads/1/3/0/7/130776132/c3292791117.pdf
    • http://wotenulug.placercountyreviewagency.com/uploads/1/3/1/6/131636733/jiruxus.pdf
    • http://files.todayssmoothie.com/uploads/1/3/0/8/130874360/357580.pdf
    • http://mokeju.eartharkbotswana.com/uploads/1/3/1/4/131483245/5513673.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/toyota_camry_2013_hybrid_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/ludonedigeduxuwud.pdf
    • https://cdn.shopify.com/s/files/1/0448/8049/4759/files/some_important_full_forms_for_general_knowledge.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/77331849634.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/xilibadefiruxur.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/69350142626.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/71393538607.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/73315700873.pdf
    • https://cdn.shopify.com/s/files/1/0429/7991/7987/files/answer_to_daily_jumble_today.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/fusionner_un_fichier_en_ligne.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da6.bin
ac3d0a0d70967ee94f500016b50b5d7a47d4e2836a618c382bd51609fa513fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5240 bytes
font_01_sfnt_off00006f53.bin
8f25e509e715d20a6bece8685a5604bbcbd1f5077bed5d3c3798b8c836958252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F53 2172 bytes
font_02_sfnt_off0000793d.bin
b535aadf04df4842c8d5aac7e288e0fb911640f0ced4b0844e118537e983a9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 10292 bytes

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