Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b305bcf2ede7d7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 01:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef448a33440396465ecf70edf7e1dd63 SHA-1: baca18b3f0df92757c8fbc426e0201c2833bf92d SHA-256: 71b305bcf2ede7d72324c97aea9bbd2d36434a3b42b5b239198c7e00d8b17b3e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body and embedded links suggest a lure to entice users to click through to potentially malicious content, likely for phishing or malware distribution. The presence of multiple PDF links, some pointing to benign Shopify URLs and others to unknown domains, indicates a link farm strategy to obscure the malicious destination.

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=ipad+pro+apple+pencil+pdf+markup
    • http://gerebise.conleytrack.org/uploads/1/3/0/7/130775519/7f4116.pdf
    • http://resijil.shoggothkinetics.com/uploads/1/3/2/7/132710657/tilopiwipozosuw-lodejilunawunob.pdf
    • http://files.aliciafink.com/uploads/1/3/0/8/130874496/e761e6ef74.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/bisilofizagoranedex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/45851299329.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8639/files/89041886122.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/84652119633.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/61948166860.pdf
    • https://cdn.shopify.com/s/files/1/0449/4458/8959/files/bangalore_central_university_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0448/1345/1430/files/different_ages_in_history.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4368/files/bearded_devil_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/adobe_photoshop_cs5_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/subefapomodexolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/pofizoviwigidomitagatavor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/auto_data_direct_phone_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/mumikonifapuxalawujaxu.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_off00006ba0.bin
9ad577142a3a1885126c4d86e7f6815446fcc37eabaaaf020bdafbde552707fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 5124 bytes
font_01_sfnt_off00007cf1.bin
1cdfbfb059e7b6655a929f48de24cea4ff261a005146c7374a67e30fbbf15332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF1 10076 bytes

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