Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f7c2505f536565…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 14:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a910e061dc1b19f0a7e17eb94ee6811f SHA-1: 66b6b7719a8890ab487ff2180468f2e52388a003 SHA-256: 72f7c2505f5365657f01ac589b0c281ac4cf2669ab3ae6d766ca775e51acd028
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host further malicious content or phishing pages. The document body and embedded URLs suggest a link farm technique, where numerous links are provided to obscure the malicious destination. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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=heavy+rain+ps3+trophy+guide+roadmap
    • http://files.landandairphotoworks.com/uploads/1/3/1/4/131409463/roxejak.pdf
    • http://dexivad.markwatsonwilliams.com/uploads/1/3/0/9/130969723/869b22a64539a.pdf
    • http://files.nfpplanning.com/uploads/1/3/2/6/132682868/wenipot-fawoxu.pdf
    • http://files.celebratecorvallis.com/uploads/1/3/0/7/130738576/xotumejuwuposapuzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/88091399228.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/xogujujezixigerevar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/41691520564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38804475130.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/important_days_and_dates_in_a_year.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/craftsman_41a5021_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/75151098579.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/jailbreak_full_movies_app.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_off00006f51.bin
4e5dfda33472adea81049732119deb88a9a6aa8659e6cc1d7dbf0454789e8830
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F51 5628 bytes
font_01_sfnt_off00008249.bin
e588469b19a0d9cca57155208236ff436974c2e954d4cfcece4f1f40774fbefd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8249 10060 bytes