Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de528f630fc0f66…

MALICIOUS

PDF

42.1 KB Created: 2020-08-24 18:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e3b7ed8aa998b41cdbff51c1737a48 SHA-1: 7e32f20ae91294f0ef20bb1674e99bddc7e1ee35 SHA-256: 7de528f630fc0f6681a50acc3e0176ddc6d9b6c2d7bd33956f76f6151faba756
154 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 likely used to obscure the final destination of the malicious payload. The document body, though obfuscated, contains text related to 'Chase binding arbitration opt out template', suggesting a phishing lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=chase+binding+arbitration+opt+out+template
    • http://files.awakenteenleadership.net/uploads/1/3/2/7/132712006/833b28f6861.pdf
    • http://xajowetul.germanshepherdguide.com/uploads/1/3/0/8/130874493/fovodimomeveg.pdf
    • http://files.gregantoursireland.com/uploads/1/3/1/4/131453284/4047834cfc.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/5539892125.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/60667459108.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/games_like_stardoll.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/80594265675.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/sanusirofikurotor.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0070/files/26994450050.pdf
    • https://cdn.shopify.com/s/files/1/0434/1664/9890/files/biological_science_freeman.pdf
    • https://cdn.shopify.com/s/files/1/0463/5338/3586/files/17432896850.pdf
    • https://cdn.shopify.com/s/files/1/0439/9982/1982/files/caucasian_chalk_circle_novel.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_off0000647d.bin
dddc1168049f46b071ba17f7c5379809ec983a9baf96df23a456410e7acc0016
pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 5416 bytes
font_01_sfnt_off000076ad.bin
0e42263d54aa99766596659353194f25b1ccf6b2496029d860b980fa36e8f39f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 10800 bytes