Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6380892c6a11f1…

MALICIOUS

PDF

40.2 KB Created: 2020-08-06 21:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8ab607c0ef1e360ef8e9bbd9914c4fd SHA-1: 19d9c697e68fb5fb3b2888365626a08c3d35739c SHA-256: 0a6380892c6a11f119cd2f284a278430971defe174307e29a9b91a507a1080e9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document also contains a large number of links to other PDFs hosted on Shopify, potentially as part of an SEO link farm to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attack.

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=calcitonina+y+parathormona+pdf
    • http://files.lochletter.com/uploads/1/3/0/8/130814423/7d62223a.pdf
    • http://files.luxefamilyholidays.com/uploads/1/3/1/0/131070291/mojuxatis.pdf
    • http://negave.javapandit.net/uploads/1/3/0/7/130738970/a2e8aadc7390.pdf
    • http://files.terrraofwyoming.com/uploads/1/3/0/8/130815277/bosal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/forimiwuzibinujorinodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5376/files/english_grammar_notes_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/31567953436.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/33714953874.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/gosijipoxonopejitajixokad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7620/files/16932965222.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/tosesoxatede.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/filagixupebukatiwij.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/zizobiwusuwusaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/kepugakenazapuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/2724745765.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_off00005f9c.bin
6eac4d138fb6936fe16420bda77aac718541b30bb1915aa5115e360776fd4b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 5224 bytes
font_01_sfnt_off0000713b.bin
7e039b96a626f3c4dfc79b0d78e302879938ada1d221adc434aca03beaf99285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713B 10128 bytes

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