Malicious PDF — malware analysis report

Static analysis result for SHA-256 868655564c342166…

MALICIOUS

PDF

38.9 KB Created: 2020-08-31 03:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb458c3f85ee48eb637669c9ea6d1899 SHA-1: 05ee834513cb8049719ab6fab9c8e315032a661f SHA-256: 868655564c3421666cca2ace6adc01713e59d673c4710c1b9dfa85af39e7aca0
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=honda+helix+250+service+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference a service manual, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links also indicates a link farm, potentially for SEO manipulation or further distribution.

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=honda+helix+250+service+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_da332fba4c2d416aa22f94bcbf61e122.pdf
    • https://static.usrfiles.com/ugd/98857b_cbbec23bf2e547daa7a0528d0543a8c4.pdf
    • https://static.usrfiles.com/ugd/902d29_175536b3b04445599c95858840b63f66.pdf
    • https://static.usrfiles.com/ugd/cc14e4_4d054ce41f5e4b3a8eb364c790bf359d.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/7631081557.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/pdf_editor_insert_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/kozajugixibuvuboxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/gozel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/638_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/85640406549.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/28100115395.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/algebra_word_problems_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/puwar.pdf
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/best_cover_letter_for_job.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/55983099021.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.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_off000055ad.bin
9be3c1ba8e73cef8f9099cfce209a005737a18ab213c1493e042fb0346ab4c17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AD 5664 bytes
font_01_sfnt_off000068c5.bin
4678ea4ce41a0370c0e9eb4188f1d47e3b465c0db300992b7475281025f509eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C5 11924 bytes

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