Malicious PDF — malware analysis report

Static analysis result for SHA-256 0643aaddca5ce332…

MALICIOUS

PDF

137.6 KB Created: 2020-08-29 14:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0d7e6f2aa3474b30a978d5aa746e3d SHA-1: 4f0f8c779d50d9a04f79a4245929957814217807 SHA-256: 0643aaddca5ce33274f809c7b03752ed6ebdee1d49c5a5dbffc95783eaa63f2e
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 pointing to 'https://ttraff.cc/wix?keyword=golden+throne+40k'. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=golden+throne+40k
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0200/3609/files/49693153271.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/tewaferujiwudinubedan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/onn_8_android_tablet_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/abs_workout_plan_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0438/3077/1869/files/74666821783.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/97394059970.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/goal_celebration_gif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/rosuwipepusozudufig.pdf
    • https://cdn.shopify.com/s/files/1/0462/2607/9895/files/coniugare_verbo_credere_forma_attiva_e_passiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/8346/4855/files/13586954311.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/atkins_phase_1_acceptable_foods.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/nolanumutatamonoliro.pdf
    • https://static.usrfiles.com/ugd/b8c837_935a8343ec544018a841e5ed105e3f9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_498678ef71d249f4ab1483fe0aff4f5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_18b4dcb7af6a4cc18f8d0f2ff2453413.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f41d50bd7f64d228cd4e79a77c7ca11.pdf
    • https://static.usrfiles.com/ugd/b8c837_e78e36a1c22747dcb339d72b2da3f9c5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d734.bin
bfb03142b1341c308e8fce16a4788c24b78767aa006b6627f9b2e0883cfc8864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D734 4592 bytes
font_01_sfnt_off0001e6c5.bin
5a2c6f4b4f5e3e0132d25ec4cfb00d5b3eb9dc39ab71e053023a6d2e5289a827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6C5 10420 bytes
font_02_sfnt_off00020a68.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20A68 4324 bytes

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