Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a7bd3eb7141fd5…

MALICIOUS

PDF

45.2 KB Created: 2020-08-05 05:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11d93ead6dddcdd45550881f8c5705db SHA-1: 809e3855532258998db3ec8b62c159cadab95b3b SHA-256: 79a7bd3eb7141fd5ebfa1a367ac66e10b0a2389787870a368d507a6b4720d003
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to the presence of a redirector link pointing to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute 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=les+livres+apocryphes+pdf
    • http://files.winningmentalitygroup.com/uploads/1/3/0/8/130813516/pirifiz.pdf
    • http://files.actscommunitychurches.com/uploads/1/3/2/6/132695620/nedovafofetarebiruto.pdf
    • http://files.leapingkoi.com/uploads/1/3/1/6/131606984/d4d553a4de6b.pdf
    • http://jumukop.australian-spirit.com/uploads/1/3/1/6/131606289/3303195.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/channel_3_weather_cleveland.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/dalababaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/2d_and_3d_animation_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/xisigupipojugopawawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/soxanila.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/vevefotolo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/vuxojekodunula.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/mibujivibezasabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/33121442670.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/58145477108.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/cadenas_de_abastecimiento_dinmicas.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_off00006f0a.bin
d290793f31f9ca0d3ad7a3da0382f3547cdfd3a59843283105bc33a0e2d985c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 5344 bytes
font_01_sfnt_off00008144.bin
777c7e49a8411ecce0fe7fab7cec48c6d76e4d81d56b6f348b9a3fa010f131b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 11892 bytes