Malicious PDF — malware analysis report

Static analysis result for SHA-256 9117eec3509cb85b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-25 05:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4f0605659b89e2697756f826ee072e7 SHA-1: e931b298d23cad2694eb9384b2db458b4f478b97 SHA-256: 9117eec3509cb85b1df0dd184c849a82ac4ef7d18a8fa113c5433f468e9c9fe2
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The document body contains obfuscated text and a URL pointing to a known malicious redirector. The embedded links, including one to `ttraff.ru`, suggest a phishing or malware distribution attempt. The presence of numerous Shopify links, while some are benign, is characteristic of SEO poisoning or link farming tactics to obscure the 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.ru/pify?keyword=minnie+mouse+sheet+cake+walmart
    • http://files.thunderhawkcaucasians.com/uploads/1/3/1/4/131453598/47c9d9c.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/the_jaunt_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/tupakidinivakubititon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/84945941832.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/52387988183.pdf
    • https://cdn.shopify.com/s/files/1/0433/2837/2904/files/basant_maheshwari_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/john_deere_l111_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/30267212806.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/duwepuji.pdf
    • https://cdn.shopify.com/s/files/1/0443/9552/8358/files/kitchen_design_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/zuros.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0431/5748/7778/files/38832310441.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005628.bin
37f42100e5fbddded89a426b6e7ec409a516318b4fdb94443601962089229375
pdf-font-stream PDF embedded font (sfnt) at offset 0x5628 5200 bytes
font_01_sfnt_off000067c1.bin
12db6725d36f9ea87719e7ee8e569dfe3bf741484649429203fd63ae86ff1e8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 12360 bytes