Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4333918295b7e03…

MALICIOUS

PDF

37.3 KB Created: 2020-08-18 21:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20bb46310548ee979d7454f53ad4dfad SHA-1: c9714bbb06ed96d5886139a877d194d2961e2ede SHA-256: b4333918295b7e03d8e9cb2bf3a83688ca6117823692eb8f903f80dd1900e725
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a user manual for Alienware hardware. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the overall structure points to a phishing or malware delivery attempt.

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.com/pify?keyword=alienware+aw2518hf+user+manual
    • http://files.mimisbooksandmore.com/uploads/1/3/1/3/131384660/xudokorud-xerufov.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/55117255309.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/banezabewizonagomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/fagezep.pdf
    • https://cdn.shopify.com/s/files/1/0446/2919/6963/files/wepotowoxazulox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/valspar_brush_pearl.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/abbreviation_of_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/88144021918.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/pufubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/gisawebobugusubupa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/joyce_meyer_bible_study_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/biology_robert_brooker_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/bell_fibe_tv_guide_not_working.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047af.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x47AF 3724 bytes
font_01_sfnt_off000054ec.bin
f68f3b626e76ff72a5992594e9a43ae98cd56c6021d3794a06a495bbb01fe008
pdf-font-stream PDF embedded font (sfnt) at offset 0x54EC 5592 bytes
font_02_sfnt_off000067d7.bin
cbecf5c5a3400c12e0bf8f1ff7416413becf72a5344d572d60cd918a18ce37f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D7 9376 bytes