Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a33030dc3efc467…

MALICIOUS

PDF

41.5 KB Created: 2020-09-03 01:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e152c5cef104aa2d0932869c207bb5ca SHA-1: b7ed11f11bbc4d40ca2fa8ad442678ae2d4b0020 SHA-256: 4a33030dc3efc467134a72b5e1c3edf6e956fa070a103bc81b5e066b9c20de6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though partially corrupted, contains the text 'Political map of north america worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility.

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.club/wix?keyword=political+map+of+north+america+worksheet
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/jukewefiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/fat_sick_and_nearly_dead_food_pyramid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/95322617030.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/jirefinitomo.pdf
    • https://static.usrfiles.com/ugd/911c12_fcac16d4fd5b491290e52ddced43fdce.pdf
    • https://static.usrfiles.com/ugd/a771bd_83bb4fddf5ae4e219c0453e5b3421135.pdf
    • https://static.usrfiles.com/ugd/a8c229_09a90c37f6be459aae6492a2712d5a26.pdf
    • https://static.usrfiles.com/ugd/c068f8_103b904b906242ca99ea9fcb2a5153b5.pdf
    • https://static.usrfiles.com/ugd/ab922d_a0a1d04ae1e04c5f8a4b27f676a3b0d6.pdf
    • https://static.usrfiles.com/ugd/36f25b_341a8743593d4ac7899c546eb0b1ec1e.pdf
    • https://static.usrfiles.com/ugd/93c935_f5a12f01b92a4ae986e7bbdbe308871a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/juwogope.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/sister_souljah.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/34164377607.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_off00005ded.bin
7f72bbd58850d52c356d474fc2443bef93d423bf2650699c455006badca01454
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DED 5412 bytes
font_01_sfnt_off0000703b.bin
9b972729d9920314c3a094546814d500fb3888c1be9481e44aca05a145035e7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 13048 bytes