Malicious PDF — malware analysis report

Static analysis result for SHA-256 e320b03c867111df…

MALICIOUS

PDF

47.9 KB Created: 2020-08-19 23:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98e8ab833f291c7900852a86d54c934d SHA-1: 3537c931ad2e408c735b029dda9549036ac49989 SHA-256: e320b03c867111df0f97596c68936b916686cb9086611490d9fc9e44252eac1a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a biology book. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute the malicious URL. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=biology+book+for
    • http://files.theessaydoctor.com/uploads/1/3/0/7/130738741/c3faa9c4b4e8.pdf
    • http://jekamik.lampworkbeadsandsilver.com/uploads/1/3/2/6/132682646/jimonojabixifog.pdf
    • http://zagufavuv.artcollectivefrederick.com/uploads/1/3/0/8/130814297/bizumagoxe.pdf
    • http://files.sandpiperonsmithslake.com/uploads/1/3/0/8/130814492/pulelu_sutiwefelugaji_lisukijedateg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/ribigaxaxoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5210/5881/files/business_management_and_administration_books.pdf
    • https://cdn.shopify.com/s/files/1/0447/1940/7257/files/minecraft_roots_2_sprout.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/25858915222.pdf
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/ap_transco_ae_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/nemolarafowifutug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/gesufume.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/dikutirajizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/70829814242.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/add_png_to_preview.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e92.bin
894323ca5b953dc89958e82d002df74824425adab5d8f2cadc7d2ded45f76d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E92 4900 bytes
font_01_sfnt_off00008f60.bin
83ff609b05aecfbd3a930e1074bfd10f896713f440b6ce6c10bd414db632afb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 10516 bytes

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