Malicious PDF — malware analysis report

Static analysis result for SHA-256 074c164e540c57ae…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 21:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0a8c6efe56b8cbbdf61175935a6e8a5 SHA-1: b98b774b289ae97c9001ec15239c8df47796fbac SHA-256: 074c164e540c57ae4f69070da0bda853fb7f564fcc3c3059667adcd8854a9759
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify?keyword=jeunesse+dor%25C3%25A9e+reportage. It also exhibits a PDF link farm heuristic, suggesting an attempt to generate traffic or distribute content through numerous external links. The document body, though partially corrupted, contains the same malicious URL and a benign-looking Shopify URL, reinforcing the lure.

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=jeunesse+dor%25C3%25A9e+reportage
    • http://files.learnhow2lead.com/uploads/1/3/1/3/131398145/3665035.pdf
    • http://files.salisburyadventistschool.org/uploads/1/3/1/8/131856072/6298606.pdf
    • http://vumopuki.karenhaugen.com/uploads/1/3/1/8/131872295/disidijilemoge_kagesujokakipa_bavin_tokufafib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3739/3049/files/descriptive_language.pdf
    • https://cdn.shopify.com/s/files/1/0433/2778/3080/files/39143600460.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/37220703010.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/29919325009.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/bioavailability_bioequivalence.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/wasasilatigusivusizuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/fisiologia_do_pancreas_exocrino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/best_android_mobile_phones_below_15000.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/60608546032.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/lefinozuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/vumenere.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_off00006b97.bin
810536b5d85fddd2518d6935a2b3680448b0a625a8e91998e6cde7c913dafee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 5224 bytes
font_01_sfnt_off00007d22.bin
e4eb918b4eb37345b8d922570c0179bfe7bfaa760b8cbeba9a7b843976d3929c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 12100 bytes

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