Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c46154c28be059…

MALICIOUS

PDF

38.2 KB Created: 2020-08-25 15:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ddaa80e947be591ce1a8fdda3eb8e71 SHA-1: cb2a24d314612d0af1a2352c0aae3fdf82b81205 SHA-256: 71c46154c28be0599d91e9dbe160fe9293d4a8b774e577fe1388e3c18b961b6b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to sheet music. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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=deck+the+halls+sheet+music
    • http://files.marinersguide.info/uploads/1/3/1/4/131414516/75d76.pdf
    • http://files.hellewoodworks.com/uploads/1/3/1/3/131384573/sapamexowajug-tabiluzut.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/9/130969634/namotesejutu_jafesumosuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/neverwinter_artifact_equipment_refinement_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/63367853554.pdf
    • https://cdn.shopify.com/s/files/1/0440/7823/5798/files/cub_cadet_ltx1040.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/dunizepuxawujebabawiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/zerajako.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/riwap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/brown_1981_rock_characterization_testing_and_monitoring.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/xabofimekabadikoxotal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/roxuwaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/47716103358.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/wabogur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d3b.bin
8e730cd3f9acb3a5b3a0fff97f3db9f6965a95e2ef7098fde8572e741c494a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3B 4672 bytes
font_01_sfnt_off00005d21.bin
44b349e6cae22fe36a27d6420d3b579fd9b49260113f1d910b588583ea72e65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D21 9596 bytes
font_02_sfnt_off00007e0b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0B 4324 bytes

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