Malicious PDF — malware analysis report

Static analysis result for SHA-256 6753b1ce6c2be741…

MALICIOUS

PDF

44.5 KB Created: 2020-08-02 15:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9f2e7ee56d785e7d4c097c3e2d2845 SHA-1: 33596ec700853a2091daa2a8b593043ba0a97c41 SHA-256: 6753b1ce6c2be741311de51caf636918374c27b128b45ed14428eeeacd326019
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.com/pify?keyword=ff14+weaver+leveling+guide'. The document body, though heavily obfuscated, appears to contain text related to gaming guides, suggesting a lure to trick users into clicking the malicious link. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic.

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=ff14+weaver+leveling+guide
    • http://files.wsr-tlc.com/uploads/1/3/0/8/130814132/9af7ac6.pdf
    • http://files.thebrowniecottage.com/uploads/1/3/1/8/131871909/zuvakexukamufokileja.pdf
    • http://files.joycerandall.com/uploads/1/3/1/4/131406391/bupadikufazu-jolebuzewi-luwajenoji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0739/3439/files/bokewekijov.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/59630554063.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/13894759473.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/61009214853.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/20481371.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6497/files/24649025280.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/fudopajebufuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/jexideli.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/4635524927.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4176/files/belukuxubovotazator.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_off00006fec.bin
7907a06fbca850260b72003ca9118309e2cc013b26ce95e4670d0552228a9b33
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEC 5144 bytes
font_01_sfnt_off000081a3.bin
194592e440e384180e9f4de4c7d5de7d4026ae8afaa46f6cac45bbe6c1ff2799
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A3 10388 bytes