Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab13f6d80732862c…

MALICIOUS

PDF

47.4 KB Created: 2020-08-30 10:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20625f7100b242c3be18cb89cdad856b SHA-1: 18d086dcd2a68ed170058cf0b1c2081317c173f0 SHA-256: ab13f6d80732862c0d4a8f80d76096511efa6e1eefe9ae5df484a21ee8121c8b
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for printable agendas. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to ttraff.cc. The document body and embedded URLs suggest a link farm designed to drive traffic to potentially malicious sites.

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/wix?keyword=agendas+2020+para+imprimir+pdf
    • https://cdn.shopify.com/s/files/1/0434/0039/6956/files/saxulelowezakepogigiser.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/durable_power_of_attorney_form_florida.pdf
    • https://cdn.shopify.com/s/files/1/0436/3590/0569/files/bejeweled_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://static.usrfiles.com/ugd/824332_f056ad16a45643269fe0b8308a480987.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a080b41d5e40d0879a4276ef87e7a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7567d631f994d1c92a30438b87d2f49.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/milf_villa_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/westlife_swear_it_again_lyrics_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/vejanilepezojigel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0220/0223/files/20024361493.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/gonurawonikiretovopefesow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/pulopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7256/1050/files/xofawopovuraterujo.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_off00006016.bin
6e6af5a4062f292496e90d7edabd04ff8fe4c2665da1be6b184efa30d9fabf8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6016 5592 bytes
font_01_sfnt_off00007306.bin
6a46304d99379038de6304ca4393c03593fce2192d88e3b6fd9443343666d0ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 11696 bytes
font_02_sfnt_off0000995a.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x995A 16312 bytes