Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec0f7d2ed043fd7…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 00:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d4b926d6babf3e734ceefcdcd3e419 SHA-1: 40c96e4b91d68db10228aac274cfa95b47467eba SHA-256: 5ec0f7d2ed043fd729ca8a1f1fa077c7e8f206df83846e9a953073520bfc4caa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Marcy pro weight bench assembly' and includes the malicious URL, suggesting a lure to redirect users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known malicious infrastructure.

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/wix?keyword=marcy+pro+weight+bench+assembly
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/carbetocina_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/mimobuteb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/retrospecto_americanas_grtis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/american_society_for_apheresis_guidelines.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_7bb1bcd629b44bd58276d54177cc028e.pdf
    • https://static.usrfiles.com/ugd/3826db_56558d1f01e2430282296b9e895f501b.pdf
    • https://static.usrfiles.com/ugd/2ac701_5e76bc8ab6b24b729f0463c54831fea5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d220dd90284c729c86f96fde353a67.pdf
    • https://static.usrfiles.com/ugd/b8c837_46dc87ecc9b048e3a764ab1bcb320ec0.pdf
    • https://static.usrfiles.com/ugd/4b874d_2480bf7e73f74cdeadb2a78137290fb5.pdf
    • https://static.usrfiles.com/ugd/fa6f14_16f936ac5c9a45b7a492609251040884.pdf
    • https://static.usrfiles.com/ugd/0d002d_322a23958f2c45f78a6a2064bd544453.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/vevefonoduwaxed.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/download_act_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3177/3852/files/ralanofejabiguzatuzal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/liwidivotijazawage.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/proform_treadmill_calories_burned_calculator.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_off00006fc8.bin
c026bca27f38a22ff33613f04917d0f8953b5cdcb82c24cd574f1115ab4fe0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 5688 bytes
font_01_sfnt_off0000830d.bin
0efcc0e254feba6d2be32343d780c429823bee2cdd983c76763bd03a1c28bbb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830D 10720 bytes

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