Malicious PDF — malware analysis report

Static analysis result for SHA-256 74da1f1d6777c20c…

MALICIOUS

PDF

34.6 KB Created: 2020-08-29 16:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd353ba2200014153f7b7b36d93b0bb3 SHA-1: af3e1da390c656af70ec8410ed04a382e6e3d43b SHA-256: 74da1f1d6777c20cf343f1a09c1d270d770ccd280121cdee372e641469c77133
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.cc, which is likely used to distribute further malicious content or lead to phishing pages. The document body, though heavily obfuscated, contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=crock+pot+bbq+pit+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/2162705442.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/letukosakevaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/sesepetok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/tojazus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/wevimeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/hardy_sandhu_all_mp3_song.pdf
    • https://cdn.shopify.com/s/files/1/0461/3681/9865/files/standar_akreditasi_rumah_sakit_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/kiwemajigogosesogiz.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b37d9aa804401eaa7efcb86fe66818.pdf
    • https://static.usrfiles.com/ugd/b52961_b096aceee7244523b7df87074cb5e4fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_893dac0340ab4e1f8b41f172dcd4a74f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b20d45d18b94ade923c547aeb79234d.pdf
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/2204962545.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/zomatasibevi.pdf
    • https://cdn.shopify.com/s/files/1/0446/0973/2771/files/12_emerald_tablets_of_thoth.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_off00004a11.bin
066cecc73c1880bbc5f2e7096d59a3c1dead1d04a4a60a5e6ec0931a7dc8efc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A11 5136 bytes
font_01_sfnt_off00005b6f.bin
c681b89a80159348e01690cd8d481bac7d3624fef43c8ff367d7039d99cad480
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 10580 bytes