Malicious PDF — malware analysis report

Static analysis result for SHA-256 da80edad60a3e498…

MALICIOUS

PDF

60.5 KB Created: 2020-08-30 19:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0f0c5e8bf597ca5e400d719e6f6e1e0 SHA-1: 29323cbaaef9d67bdead08652241b605adf40335 SHA-256: da80edad60a3e498f8d888887aa64e1ff70dc7fe8b6d6afec2710944cba19bbe
154 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.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the malicious redirector. 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.cc/wix?keyword=the+secret+a+treasure+hunt+treasures+found
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/pinefasavipejudip.pdf
    • https://cdn.shopify.com/s/files/1/0437/0133/8280/files/gaxidodoz.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/wow_archaeology_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_50302e195d97412e80bf43dd01a2dd3b.pdf
    • https://static.usrfiles.com/ugd/529dbf_aff4023afb1f44489544489feaa13491.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/gargantuan_size_5e.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/77579206304.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/xobekibazekimug.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/jagokesonizisujuvo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/34679070740.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6375/files/zogonegagokiwudagi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/xubutidiforekurigifivuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/template_digital_business_model_canvas.pdf
    • https://cdn.shopify.com/s/files/1/0435/8881/2959/files/wepabisunabe.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_off0000b136.bin
ca7b6229ff07bc094f87f6461f373758642035c3d56cb27c5294a88bc96075aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB136 5024 bytes
font_01_sfnt_off0000c23f.bin
68176edeeb869f17d0541c9faea916416a282136b96f69072e99ece80f44976d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC23F 10128 bytes