Malicious PDF — malware analysis report

Static analysis result for SHA-256 649a1ffe30fbc20f…

MALICIOUS

PDF

308.5 KB Created: 2020-09-02 02:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28dcab7ae3cc1a4a9b162be80958a6f9 SHA-1: d22c86bab29975f75e1177a232e15f1d7bc9206d SHA-256: 649a1ffe30fbc20f07932e94ca07a82eb8bf7b6ada2811acda1cca3db549cd27
134 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic further indicates that the document's content is designed to trick users into believing they are accessing legitimate guidelines, likely to facilitate an advance-fee scam. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL is the primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=esc+easd+guidelines+diabetes+2013
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/1a89c8_0d6baf4bc85e4a94924b7de498f682da.pdf
    • https://static.usrfiles.com/ugd/f1780b_1d1f09d1251d49e1bc621167c25a2e7c.pdf
    • https://static.usrfiles.com/ugd/ce5d00_05b7d9715a024643b3a6b12d751f48fa.pdf
    • https://static.usrfiles.com/ugd/b0b521_b376bea564d2439caf4d556e6073bf84.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/social_media_marketing_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/60838162326.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pabomivunulafazibaxuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/fakinodemuzirox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/baby_bus_games_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/2634169440.pdf
    • https://static.usrfiles.com/ugd/ce14f3_3939c69d2b7e431c8e25f3f2a21459aa.pdf
    • https://static.usrfiles.com/ugd/08fe48_d5d54e4092dd44b186eb351f08283bab.pdf
    • https://static.usrfiles.com/ugd/9cb927_168223d781404b9f8bfbe55dc784d7df.pdf
    • https://static.usrfiles.com/ugd/64e449_61eec579a13f4b0f88535de4339bc9f5.pdf
    • https://static.usrfiles.com/ugd/f65175_07f26154aae049e5aeb59b467dd6f604.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045b3c.bin
2da0dc5437ea526e11c21682ec6d51164907046d19ad65506f3a2fc6644bb133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45B3C 5368 bytes
font_01_sfnt_off00046d84.bin
3205229349e4c35c319d48d7d4f8d6c97e3baeb0addb29e10860c1065f90daec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D84 15744 bytes
font_02_sfnt_off00049e85.bin
98bbda09e34957c2c47eea570891e411fa41ced272e9777bbef021ce7395b75a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E85 16148 bytes
font_03_sfnt_off0004b37b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B37B 4324 bytes

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