Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a00c534c8ec95f2…

MALICIOUS

PDF

39.5 KB Created: 2020-08-03 01:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55c086ace3809083e4b89db885aea2b2 SHA-1: 76474ec7b85b64fec73640cc17d8f9049a7701c6 SHA-256: 6a00c534c8ec95f29a29461ca423374baa2532431458b4c3829f390bbb47ebe8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs and one critical link to a known malicious redirector at 'ttraff.cc'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=direct+tv+redeem
    • http://files.raccooncreekapts.com/uploads/1/3/0/9/130969220/7042256.pdf
    • http://files.vestedenergy.com/uploads/1/3/0/7/130740200/58cbfbc5.pdf
    • http://files.bestbusinessmarketing.net/uploads/1/3/1/6/131636855/6292694e889e9.pdf
    • http://files.mbraveryarchitect.com/uploads/1/3/1/4/131438228/4575501.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/zogoniwusubeguwogipepef.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/95489935200.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/kowaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4835/3442/files/3198465677.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/45684012006.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/68557742908.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/dakulurojuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/88308061728.pdf
    • https://cdn.shopify.com/s/files/1/0438/9876/5480/files/35745264309.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/dugulevumunolumowexeli.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_off00005e22.bin
f64ed84885d52f11ec4dc0b934c2fcefdd4bd63f07b80b5a723dac9335357ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 4724 bytes
font_01_sfnt_off00006e28.bin
532c5db9efdaba7ecd8e2012f8f4f902e84d197013c1d33038e542e51bdfa38a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 10268 bytes