Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b068420b8736cd2…

MALICIOUS

PDF

76.7 KB Created: 2020-08-07 07:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5f733403523a2a18316b82582ba4c8d SHA-1: e8071c163153482ceb6356f8a0dd995f0cf6a62d SHA-256: 7b068420b8736cd2b09e77e2239b8fae7e5135a20913aa84324488255aa2635f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector infrastructure, ttraff.ru, disguised with a medical keyword. It also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt to mask malicious intent. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious URLs, likely for phishing or to download further malicious 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=abdominal+perineal+resection+pdf
    • http://letuto.sneakpeekproductions.com/uploads/1/3/1/8/131856380/bafonexeweru.pdf
    • http://files.loveandmascara.com/uploads/1/3/1/6/131637529/doguloxim_sogedosazev_miwumudukuj_zedikibu.pdf
    • http://files.capturingculture-reighanfisher.com/uploads/1/3/1/6/131606789/db242.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/jewibanolaredomalojepovim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/enterprise_architecture_styles.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/64032430718.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/kupesoxumozobopifivodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/xuguse.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/86427233119.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/37885983396.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/mugofolavawan.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/modal_verbs_advanced_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/buwimutepigezawapofokalib.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/tevasexatijolitazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/rowikekixaxuzujovudenuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/94158543148.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb2a.bin
fb57379ecc63d46c05b9985067e544321dab6487be686f427533ec794a037d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2A 14764 bytes
font_01_sfnt_off0000eaac.bin
29dd3516e49563475308474bb73572a5f9e94b8aa532a11b88daff3a7aa662e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 5432 bytes
font_02_sfnt_off0000fd02.bin
9b5a95015a9d596552d4520700959da01baed6e9bf59011772eba227e3cd4538		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 12380 bytes

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