Malicious PDF — malware analysis report

Static analysis result for SHA-256 7871ca415a57a01d…

MALICIOUS

PDF

42.2 KB Created: 2020-07-28 11:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa8558c78767e34efdad4a0e6957ad4 SHA-1: 17db73b33c074e3615d19da695bf48978d5ad33c SHA-256: 7871ca415a57a01d61bf375e388182526871ccb4f169f3493d896d4efc6e06ab
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for "camtasia user manual pdf". The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO abuse tactic. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attempt.

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=camtasia+user+manual+pdf
    • http://files.kswatsondesigns.com/uploads/1/3/1/3/131398117/rovizumazij_pevov_golaxitaj.pdf
    • http://files.tzununahealthyself.com/uploads/1/3/2/6/132681145/d08ca9451cb46.pdf
    • http://files.mylocalboard.com/uploads/1/3/0/8/130813447/f9f76fc1e947bd.pdf
    • http://files.insomnilacq.com/uploads/1/3/1/6/131606046/d44a85f989a0457.pdf
    • http://files.oregoncabinetdesign.com/uploads/1/3/1/1/131164324/negesabinodo-vofobi-vosomu-bofudafoxuxuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/26502514115.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/levumowiduxuvofurevar.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/dakafuwitizowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/xupevotuwisedegogojufire.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/fugojelekusuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/tosijedufewamafoxuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/jipikibizixurigepesa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/55014601861.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/19054018877.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/54236371257.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/3664939852.pdf
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/ziloguru.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/76274408298.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/guxoxapikekixol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/jiwowuxawotuzetanofud.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_off00006910.bin
972ca03677bb708edf2c9dc2ffd55f177f18ead0df8f7ed3d47935beab9b6872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 4984 bytes
font_01_sfnt_off000079e3.bin
301fed4063b818b8beb0b7a4d60fa42bbd1bee37394f2fb5da02919321a9777b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E3 9900 bytes

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