Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c78f76d575ccaca…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 21:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c748a33ca4d83c9e952eb621b3e09a12 SHA-1: 8253680b120358c5dbc405a79b2768c702874890 SHA-256: 5c78f76d575ccaca87721b0a05a6b26d040ebbf2bad7cde30006ad3c6d7d916e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous embedded URLs, including a redirector to 'ttraff.cc' which is flagged as malicious. The document body, though partially corrupted, suggests a lure related to Gmail read receipts. The presence of many external links, some pointing to Shopify-hosted PDFs, indicates a likely attempt to distribute malware or phishing 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=gmail+read+receipt+without+recipient+knowing
    • http://files.harrietslaughter.net/uploads/1/3/0/8/130813921/812699.pdf
    • http://files.tradepennystock.net/uploads/1/3/2/8/132814980/3088012.pdf
    • http://files.thedelidownstairs.co.uk/uploads/1/3/2/7/132712034/wetosixoriwofu.pdf
    • http://www.fotolia.com''gt;Fotolia.com/a'gt
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8647/files/mutelabomipir.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/mobixexabuwejifirure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/lutozezafevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/rogokoliribebuled.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/bimap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/65962278732.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/fiwozuwigezevugaxav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/adventure_time_season_9_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/gamejibunexibisa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/nefewejakitipupopo.pdf
    • http://www.fotolia.com
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006390.bin
984b2aa0dc6c352de05f6cae55151d93e906d5c9b6733f2c387e539a6d67b0de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 5496 bytes
font_01_sfnt_off00007625.bin
671285b736335f43abd5b7d6f88280f5eab889639f868b5d590d7bfa1e71938b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 10076 bytes