Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d5ceb09a5b2e31…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 21:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7da1a4ed4d0a7b8726db7294dccc8186 SHA-1: a8140d1403d938b5a25a328bdac42e6f22a61132 SHA-256: 05d5ceb09a5b2e3188ac3be6063ed66d55b2c4f3ddbb84e8559c7431f561af92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lure users to malicious infrastructure. The presence of a large number of embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the ML classifier and redirector heuristic strongly indicate malicious intent.

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.ru/pify?keyword=el+caballo+de+troya+1+pdf
    • http://files.darnhallparish.co.uk/uploads/1/3/2/6/132683264/simalaganopoguweje.pdf
    • http://files.southatlantabirths.com/uploads/1/3/2/7/132740418/5711668.pdf
    • http://files.angelasmith1119.com/uploads/1/3/0/8/130814783/lulog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/bengals_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/65003023090.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/74507000690.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/blinkards_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/truyn_c_tch_vit_nam_hay_nht.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/nerapusimobezaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/sibex.pdf
    • https://cdn.shopify.com/s/files/1/0440/6578/3958/files/52168390348.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/jukatinosovigoxigedoduret.pdf
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/latex_greater_than_or_equal_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/12297080281.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_off000068ef.bin
f41fac7e862c13a6ccc18205309a272a9ac19819c67c2f0d5b7ead3d19db6130
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5224 bytes
font_01_sfnt_off00007ac4.bin
93e2b8040e2e82916f5edffcb34392bcab76323330ef4922f296f4213459ecd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC4 11824 bytes