Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd873c883d36d1a…

MALICIOUS

PDF

40.2 KB Created: 2020-09-19 11:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1ce67ca315a7cba58fcf5837d0338e1 SHA-1: 386cd9a64c0eeb154c3271b36d9f272c2f7ae26c SHA-256: 5dd873c883d36d1a4c5a494e0853f7c675ede2c631595c3108210af6b117f60f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Scion manual transmission fluid' and a list of Shopify URLs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.me/wix?keyword=scion+manual+transmission+fluid
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3412/3157/files/project_mc2_create_your_own_lip_balm_lab_kit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/bujozafavafitolakeledafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/dofukorijuveguz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/carbon_fiber_reinforced_polymer_properties.pdf
    • https://31450a30-4e55-49f1-80c8-f1336200159d.filesusr.com/ugd/b6aaa0_4374c70e689e49f5a4228ec8ff956f38.pdf?index=true
    • https://9613373c-5ed7-4a43-9df5-13800d1c8377.filesusr.com/ugd/7dd30d_c74dae70e9ca43508d97352c6bc393df.pdf?index=true
    • https://b2d3df1d-7ab1-4b5f-9587-92257df3d702.filesusr.com/ugd/f14cf6_83005629e079474ab509182ee3a840fe.pdf?index=true
    • https://07c8243c-3fc5-457d-8b10-b7a3fbe12189.filesusr.com/ugd/f459ea_4c448dec537c4899aace5d96147f3865.pdf?index=true
    • https://a32ed4bb-4778-4426-90ba-2f26acd30a85.filesusr.com/ugd/eb2f7d_235177d9610243f5884e311890a84308.pdf?index=true
    • https://8701460e-5c14-4e9d-a8cc-6b511509052f.filesusr.com/ugd/12daa7_76dd383114a346f19b8ebdb45bd9fd0c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/5508404090.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/18350997346.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_off000060d0.bin
744efeb9006135b65e77f852265d3b20fdd94050319f48aaf53a85a1e77e6828
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D0 5272 bytes
font_01_sfnt_off000072a2.bin
a21604ad99d7a8c607993c4eb531d6576c8da9303e9d3868e342c939010bff1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 9900 bytes