Malicious PDF — malware analysis report

Static analysis result for SHA-256 056fb0522fd5cf33…

MALICIOUS

PDF

53.5 KB Created: 2020-08-08 19:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2c769d697968bae7758274094fc104c SHA-1: 1cb68ff42ce61d4e93de1b2007b1630ff26ddd02 SHA-256: 056fb0522fd5cf33c196c7bb29e1ebe994d87bc4e3d25ecb965f7ce3a36024ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Wondershare pdf editor pro for mac' and a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests a phishing or SEO scam 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.ru/pify?keyword=wondershare+pdf+editor+pro+for+mac
    • http://files.preecelightning.com/uploads/1/3/1/3/131397987/jimega.pdf
    • http://moropa.wx4car.org/uploads/1/3/1/3/131383483/7554867.pdf
    • http://files.metcalfepublic.com/uploads/1/3/2/6/132682327/9349623.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/65881398744.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/angle_of_elevation_and_depression_questions.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/91567327073.pdf
    • https://cdn.shopify.com/s/files/1/0432/6319/7347/files/48082167610.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/82132082582.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/nelasiduvipoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/cellulose_fiber.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/vadimimirumuzivariju.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/16423056754.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/84821128168.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3186/files/5067901031.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/94930493448.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_off000090cf.bin
2a6344cfac9cc2317f125de1b421fa75a06b8648af8570c567bf91904d12a637
pdf-font-stream PDF embedded font (sfnt) at offset 0x90CF 5376 bytes
font_01_sfnt_off0000a2fc.bin
5bc1db18be4167a927861894c515352691b61452dce6a14e2512e889a733d47c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FC 11144 bytes