Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66e21e318667bce…

MALICIOUS

PDF

61.9 KB Created: 2020-08-21 21:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf07ecd9331138671b83b7571f63d74d SHA-1: 4cea2996c4d52e3666ff0eac67bb184b0d7ccceb SHA-256: e66e21e318667bce1534caebb145d7edad19b2d790c188cf95d0fccd027dbf50
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high ML score and the presence of numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as a lure or initial stage for further malicious activity. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic.

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.com/pify?keyword=fitted+sheet+folding+meme
    • http://files.anelisacalmet.com/uploads/1/3/1/3/131383284/jaxevaw.pdf
    • http://befanevo.katsdogsllc.com/uploads/1/3/1/6/131606490/savomovod-wokoki-foxerej.pdf
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • http://files.lovefeastgathering.com/uploads/1/3/1/4/131407737/papidavefo.pdf
    • http://xugipe.lizrobinsonphotography.com/uploads/1/3/1/0/131070718/gezulewugix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/rusozuxibekiganowitosipof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/du_sol_result_2018_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/vobudeluxag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/xarizize.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/mubofakodiwufemad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/kaponomape.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/95396093503.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/kokalifokopowuxijofoxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009792.bin
331aec501b33196038bcbb395b8b5f2b42a542f873c0b582c06a876e4f3cb9ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x9792 4216 bytes
font_01_sfnt_off0000a679.bin
60ea95131c7bd57748c5ce742582d2d0c45fa4d8dc645860482ab567d4303f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA679 4968 bytes
font_02_sfnt_off0000b741.bin
b107a218b0bf7b78283f88fde46fb2b88dda537eea4d7518371dfaef5ff7fc7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB741 16932 bytes