Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d9f6b1760472bc…

MALICIOUS

PDF

38.9 KB Created: 2020-08-11 14:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b04d0ab2d35f806759fcc49b65e593 SHA-1: 4e223a44396abf864e68ad454a7edb0554de04cb SHA-256: 00d9f6b1760472bc16d11946c53c4cbfc3a81effdefa447535f824cd905ecddd
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a book title, which redirects to a malicious domain. This is further supported by heuristics indicating a malicious redirector and a link farm. The document body, though heavily obfuscated, contains the target URL and references to Shopify domains, suggesting a lure to external 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.ru/pify?keyword=the+usborne+internet+linked+encyclopedia+of+world+history+pdf
    • http://files.ourlifeinportugal.com/uploads/1/3/0/8/130813804/radidusizadeguluwote.pdf
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdf
    • http://rululiwi.t1decals.com/uploads/1/3/1/3/131383483/zebob-virabas-nodumarota-gurazobuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/7024128532.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/lugibixajatavedugadow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/fivaxivadedoxedip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/mivezafediwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/33056552110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/32244775373.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/the_calligraphy_bible.pdf
    • https://cdn.shopify.com/s/files/1/0434/2523/5111/files/44255186006.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/luvojisubuvufifuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/55598003279.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_off00005969.bin
face56ec449d674645d4164ea3c57d4dbdb6d0b197b721c0af129d282817ff87
pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 5588 bytes
font_01_sfnt_off00006c75.bin
62744457cf8b6a16d579610a7c0cd72eafca6401f22a6dbcfed4a316567f98ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 9908 bytes