Malicious PDF — malware analysis report

Static analysis result for SHA-256 c101d3813a8ebc13…

MALICIOUS

PDF

40.9 KB Created: 2020-07-16 08:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168737c2708e949175235041dfaac62a SHA-1: 656163f789aa240691132c24ee7a08ebc008a717 SHA-256: c101d3813a8ebc132ed6b9894e40c6764d0f135ab15c503ee7f2f43bbbe72763
152 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior by hosting a large number of external links, many of which point to a redirector service known to distribute malware. The primary malicious link identified is https://ttraff.cc/pify?keyword=risorgimento+italiano+pdf, which is a known malicious redirector. The document's structure and the sheer volume of outbound links suggest a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=risorgimento+italiano+pdf
    • http://files.estherica.com/uploads/1/3/2/6/132682819/69e77d1a3a35994.pdf
    • http://files.orangeeducationfoundation.org/uploads/1/3/0/7/130738596/469c18fc62f2.pdf
    • http://files.danamannpropertymanagement.com/uploads/1/3/1/3/131384771/5d72312eaf77.pdf
    • https://nuzipaxode.files.wordpress.com/2020/06/21807461408.pdf
    • https://kolirabo.files.wordpress.com/2020/07/ludixizozipeb.pdf
    • https://pamuxeb.files.wordpress.com/2020/06/gusax.pdf
    • https://vikezepe379027054.files.wordpress.com/2020/06/4997061095.pdf
    • https://bigoxufogir.files.wordpress.com/2020/06/18477687988.pdf
    • https://zogivuse.files.wordpress.com/2020/06/wenadikotatugiwejakuki.pdf
    • https://zefowazativu.files.wordpress.com/2020/06/89827103081.pdf
    • https://wijulibo.files.wordpress.com/2020/07/24393851097.pdf
    • https://folaredatar.files.wordpress.com/2020/06/87677456623.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/ludilawasajirufuteda.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/rugozajajiwolaberu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/zozozanojisedegibuxola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65760981278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifenawapuvesuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/nuvezopovuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30812088679.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_off000061d1.bin
cceca753432490146f44c709135a9b23026f2be95a83fe972438417c4378e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5156 bytes
font_01_sfnt_off00007344.bin
be2f953770c30feed99df7ed09e9330fa23b3cbadbdcd96599d72109b3e14072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7344 10740 bytes

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