Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d2b845f3a5dc13…

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 18:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25409e1b56dfa3bd416a56b8518d9112 SHA-1: e2df6d96f9385bd3b3bff9ae69f168aca3d9c0bc SHA-256: 08d2b845f3a5dc139113c600cf1d894bb227c18de91743f93497b7e412149695
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=apollo+justice+ace+attorney+apk+espa%25C3%25B1ol`, which is likely used to distribute malware or facilitate phishing. The document body, though heavily corrupted, contains fragments of URLs and text related to game downloads, reinforcing the lure-based attack pattern.

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.cc/pify?keyword=apollo+justice+ace+attorney+apk+espa%25C3%25B1ol
    • http://files.aarestoration.com/uploads/1/3/1/3/131380308/6310386.pdf
    • http://files.lisassalonspa.com/uploads/1/3/0/8/130873804/8097881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/28242603230.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/muziresaxupiwopobejodumam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/5463268942.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/wilerukarasiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/nupojiromeraligevepem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/41670184900.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/63632177945.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/18675075110.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/63494764450.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/76650117831.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/merofixo.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_off00005ed8.bin
a7b5aff3e2f66bac293fa552d8dfb2f8fa91354641179e071f5a83cfe56f8458
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED8 5372 bytes
font_01_sfnt_off000070f1.bin
c9a801259cac24105558d334071357724aec54e3bd3230bfd6a4377bb717f195
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 10372 bytes