Malicious PDF — malware analysis report

Static analysis result for SHA-256 61da06ea099e73c1…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 06:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3730e189d1f3a7f56467b65b000e958 SHA-1: 24c2d22d55f3ab77b5cf37bd77f01770c6dceabf SHA-256: 61da06ea099e73c15b67aee47e8bb6247525639da9b7ab7bbab69d17e73e9094
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, as indicated by the "PDF_MALICIOUS_REDIRECTOR_LINK" and "PDF_SEO_LINK_FARM" heuristics. The primary malicious URL is https://ttraff.cc/wix?keyword=nesco+meat+slicer+replacement+parts, which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit user interaction for malicious purposes.

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=nesco+meat+slicer+replacement+parts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/930050_45d64e303d8d44a2ba5752465a0cdec7.pdf
    • https://static.usrfiles.com/ugd/784815_c30df18edc5f44e2aa0b43a94615823b.pdf
    • https://static.usrfiles.com/ugd/a107db_1f0925451f5646b69c1a4f19269c3312.pdf
    • https://static.usrfiles.com/ugd/b8c837_f93452b4e75f4affa44ca5eb0e7cccdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_138a41a3984743aea227988c9871ca9b.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/vifawinijinaxigopeto.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/1549256369.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/57468346282.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xozalurowedo.pdf
    • https://cdn.shopify.com/s/files/1/0463/4705/9361/files/sosiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/itbs_math_practice_test_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/pasupi.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d3486222454cd68abd59b2f62f3870.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b032325d904897bf9cf1e87d7ac8a1.pdf
    • https://static.usrfiles.com/ugd/5ecadc_2acca2259a36481eb84af7cd2a648161.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_off00005b5f.bin
f8340be1eddf2973ac04d74e442ed647fd2968dd4e903fd57c3b371c150f0fae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 5048 bytes
font_01_sfnt_off00006c70.bin
54e4685a138a95da405bf99d49eff02d5aca4ca5ecd2c66a90361afc698ea5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C70 12796 bytes

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