Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af7ae2ddffaa66e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-20 20:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dd2035add5256aefc0db37a62c647bd SHA-1: 1b6e567d0ac91343c9b1516d66812aa3efa6b8d9 SHA-256: 6af7ae2ddffaa66e0862f18d2911e09abc2a01922492295f82ea58f4332f756c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=calendario+con+numero+settimane+2019+pdf, indicating a malicious intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=calendario+con+numero+settimane+2019+pdf
    • http://files.shenteachers.com/uploads/1/3/2/8/132814050/zovogutepepure.pdf
    • http://files.bradleyolson.net/uploads/1/3/1/4/131453894/6581222.pdf
    • http://dowarisif.paolaniebla.com/uploads/1/3/0/8/130814328/891ba6d661.pdf
    • http://files.brettjonesportfolio.com/uploads/1/3/2/3/132302970/fijimabuwatifubemuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6127/8885/files/tipalaremewato.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/josefomibaxapafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/62065162893.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/5000_daily_used_words_in_english_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/conductometric_titration_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/82979995429.pdf
    • https://cdn.shopify.com/s/files/1/0443/8360/0806/files/the_metaphysical_poets_by_t._s._eliot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/sirapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/kivikorimala.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_off000060dc.bin
bc745a96f474ba7a1fcf0439a4019138f4a64222ffac0b6e296a8165dd52c04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 5688 bytes
font_01_sfnt_off00007419.bin
a96be285e15dabebe6b9a8393ee1bc8d7fcf52b44a745dad8f20400abbffd598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 10944 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.