Malicious PDF — malware analysis report

Static analysis result for SHA-256 080435b94c9b6e3e…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 08:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245098358b2b9cbf9c4c205a0b12a148 SHA-1: 7a772c3e0413a22ddff419d7cde017544001d993 SHA-256: 080435b94c9b6e3e1c9aa97bd54b6988fe841f3c4832790c51e953a95d5cc0fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to generate SEO traffic. One prominent link redirects to a malicious domain, indicating a phishing or scam attempt. 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.com/pify?keyword=accounting+for+financial+analysis+and+planning+pdf
    • http://files.taylormadebling.com/uploads/1/3/0/7/130776218/forutuvuzoxi.pdf
    • http://menov.jlwarfield.com/uploads/1/3/1/4/131453329/b1eddf1624c3.pdf
    • http://files.alysonhunterartist.net/uploads/1/3/0/8/130814960/jirawubixe_bodaxakumake.pdf
    • http://ragexoz.tricoabstract.com/uploads/1/3/1/1/131164250/wojudulorijen_wonekomefaba_fobajisirovumaw_vezifarogibos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/haynes_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/living_with_christ.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/wosedawivip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/rabaruvamikef.pdf
    • https://cdn.shopify.com/s/files/1/0435/5709/3539/files/kazajoxuwijazunifoje.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/61948893442.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/pimezaron.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0741/files/49874287814.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/tifiwawafisisebazawos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3095/files/cooks_essentials_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/73455693584.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/noganus.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_off00006a7f.bin
f08ecc54dfa9eb95d0384bd378e5d1545296fd80b5a805f852b65f898c2f2089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5416 bytes
font_01_sfnt_off00007d0e.bin
f4d1ee8c82377aa43ca792ef72d24f06b1a13951305f600cd3cdb26893684559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 10136 bytes

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