Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb7db32ef5bb387…

MALICIOUS

PDF

41.6 KB Created: 2020-08-27 17:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb3e4cdf338d8ccca33e6016f54ca4b SHA-1: 33655371f09ebb51451913cbd8ecb8a04c1703d3 SHA-256: 3cb7db32ef5bb38793070039a82676c3ea57d6636ef8782429c043c4a23d3fff
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and a seemingly unrelated title about a car stereo manual, likely serving as a lure. The presence of numerous other links to Shopify-hosted PDFs suggests a link farm tactic to improve SEO and potentially distribute malicious content. No scripts were extracted from this sample.

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.link/pify?keyword=sony+45wx4+car+stereo+manual
    • http://files.spiritofthefiddle.ca/uploads/1/3/2/6/132681698/e2c6edddbe3b8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/apa_style_paper_formatting_guidelines_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/wifizi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/kunegovejovitoxiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5899/files/print_booklet_indesign_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/82752612583.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/accounting_for_dummies_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7958/9283/files/bitcoin_trading_platform_dragons_den.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/visisasaloxedirubagovigav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/doom_4_classic_maps.pdf
    • https://cdn.shopify.com/s/files/1/0438/5311/9648/files/husky_electric_pressure_washers.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_off00005ad1.bin
85738852a349d7c8efac94c32eedba4cbcf23a1806f2425321a8c516ba8c5aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 5520 bytes
font_01_sfnt_off00006d9a.bin
2a342601f9e9cc6705c07832904dfc686b1b7caee5934d1416e80c2d3180dda9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 14496 bytes