Malicious PDF — malware analysis report

Static analysis result for SHA-256 9642b0c1553021ad…

MALICIOUS

PDF

42.0 KB Created: 2020-08-13 22:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ce814f05340a67160a857a09480826 SHA-1: 675f374bdb84f55f81af503ea79c0ad5f9f5fa67 SHA-256: 9642b0c1553021ade6cbcfd1fda2b46debd3bc6dcb1b4edec0b78089b4370cf5
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.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting an intent to deceive the user into clicking it. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy to improve search engine visibility 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.ru/pify?keyword=free+danielson+lesson+plan+template
    • http://files.outofthedarknessgriefsupport.com/uploads/1/3/0/9/130968981/deteliwu.pdf
    • http://files.acomputerconsultant.com/uploads/1/3/0/9/130969511/3630881.pdf
    • http://files.bouncing2wellness.com/uploads/1/3/1/4/131438019/2847500.pdf
    • http://files.quillylife.com/uploads/1/3/1/0/131069819/suwad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/87970379424.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/bruno_mars_count_on_me_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/bayreuther_festspiele_2020_spielplan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/cbse_class_9_english_literature_reader_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/7092897395.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/mugazonikigepudivuwimevex.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/96675787745.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/kitofisopotij.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/kuhnhausen_1911.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/85580436161.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_off00005d29.bin
32f2ea4c8393950d57886fdc7034f7df5b8b1a754da8b2f8e82affceb13c4973
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 5060 bytes
font_01_sfnt_off00006e42.bin
eebcfc9185c9f9a247d2d3f4506983c1cc109f93243e3b35d9a0d038b7bbfa60
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 14480 bytes