Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06e076bd8b32f12…

MALICIOUS

PDF

66.9 KB Created: 2020-08-30 22:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e63323d88e6c3dcad975eabb02afed SHA-1: 06b20aa64ac8d003c9e448a11a959d70ada96428 SHA-256: d06e076bd8b32f12eb28bce8e9d460508b0d212a610769020a8fd468b0bb9809
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.ru', which is used to lure victims with search-engine-optimized content. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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/wix?keyword=the+battle+of+the+labyrinth+chapter+1+summary
    • https://cdn.shopify.com/s/files/1/0466/2840/5413/files/penowebatatidagebolug.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/7439859145.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/method_of_payment_in_international_trade.pdf
    • https://static.usrfiles.com/ugd/67e251_e12580ec7a154e4d8d6c511c10cc0d6c.pdf
    • https://static.usrfiles.com/ugd/bf650e_65147196aff94318bd235aadb09024e6.pdf
    • https://static.usrfiles.com/ugd/6f7357_8b258a6e249542d68e2a3fd1c6d34290.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/64d889_be3e3279059845a2a1fe2d48048b0d01.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/jotenufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/37265706288.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/lavuni.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/22735697643.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/80065083505.pdf
    • https://static.usrfiles.com/ugd/8b49c6_451cc923bb164ea5bcdba577b50849b6.pdf
    • https://static.usrfiles.com/ugd/db1da1_47010a26c26948fabded911f68ce1f8b.pdf
    • https://static.usrfiles.com/ugd/40512e_9f124384c5f243e3bef7b034c0e5b059.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_off0000c97c.bin
f9b55feedbb42853a39c1daf484938ebdc20654e51b7884617bdc9bfceeab93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 5500 bytes
font_01_sfnt_off0000dc0c.bin
6ca42974c143605d577392e091b1c44d79472dcc950d2b96a271accc6bf9737e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 9912 bytes

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