Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f071dc30481363f…

MALICIOUS

PDF

50.1 KB Created: 2020-08-19 23:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3f84f1c3dcbcec4ee281c96d4b31ed9 SHA-1: 45469a509b07bea7add627e2b3e395bd9cda956f SHA-256: 3f071dc30481363fe1ff9c1844b73283a00b151ba2a0ea572a9f56dfd99b62ab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a fishing report. This indicates a social engineering attempt to direct the user to malicious infrastructure. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm or SEO poisoning tactic to improve the ranking of the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=fishing+report+utah+western+rivers
    • http://files.moderncanineservices.com/uploads/1/3/1/4/131437487/vapunof.pdf
    • http://kasadolu.northwoodpolice.org/uploads/1/3/1/0/131070849/9962587.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/english_grammar_book_class.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6642/files/alcohol_abuse_articles.pdf
    • https://cdn.shopify.com/s/files/1/0429/0969/6156/files/tukobosiwoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/rigarur.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/65795842939.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/26352827341.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/kite_runner_graphic_novel_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/95478928994.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/47617191732.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_off0000863a.bin
afc9ff2f8b9e9c4c355b465795fe534b1d9f186990927d593de5fe487609c268
pdf-font-stream PDF embedded font (sfnt) at offset 0x863A 5156 bytes
font_01_sfnt_off000097d1.bin
e412bd491a8b2fea977369b78b21819c3ed0d729518d3ff7731b212ab7f2539c
pdf-font-stream PDF embedded font (sfnt) at offset 0x97D1 10520 bytes