Malicious PDF — malware analysis report

Static analysis result for SHA-256 772dd99c7e0b6333…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 13:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 124656fd3f28924c053eee8fc0bcc74e SHA-1: c5de8dca7d8e0aecccf06123a5868b725ab72da6 SHA-256: 772dd99c7e0b633326db58f5338797bc7f6c55f0d12b51c12a7338b3948a1717
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic to increase visibility for the malicious redirector. The ML classifier strongly indicated maliciousness.

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=absceso+hepatico+causas+pdf
    • http://files.powerofthecrossministries.com/uploads/1/3/1/8/131871852/7492440.pdf
    • http://ditofe.habamania.com/uploads/1/3/0/7/130738943/103da.pdf
    • http://rezoxotes.jenwillsea.com/uploads/1/3/0/9/130969754/sekovixafekasipo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/lumefebofexebofesizut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/41380294769.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/nolonajefobalo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/73285566691.pdf
    • https://cdn.shopify.com/s/files/1/0437/7349/3406/files/torimabopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3777/files/liberalismo_mexicano_contemporaneo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/jagisuvefafakewirasabuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/96224299404.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/tekubu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1990/9794/files/ribaporogiwawotoroxawig.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/using_paradox_in_a_sentence.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000723a.bin
444e39fcd5a2d2071a5a23e83c7353389ea2061d2e827d63d6296dd15e068ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x723A 5244 bytes
font_01_sfnt_off00008410.bin
bf6778ae748df024236ee45d389daf218e197787d11de849c3cba7c18d28bf98
pdf-font-stream PDF embedded font (sfnt) at offset 0x8410 11016 bytes