Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75ae172e3742514…

MALICIOUS

PDF

50.7 KB Created: 2020-08-01 23:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3653af7f0eed28ca804df294e811f73 SHA-1: 767d9fb54d67edfbd3da13a481b7b040d26a97fe SHA-256: e75ae172e3742514ff8947c697fca657bb0c3e4133205905441a4a93b18999a8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL https://ttraff.ru/pify?keyword=castlevania+symphony+of+the+night+rom, which is flagged as malicious. This suggests the document's primary purpose is to lure users to a potentially harmful external resource. The presence of numerous Shopify links, while many are benign, indicates a pattern of using legitimate platforms to host or 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/pify?keyword=castlevania+symphony+of+the+night+rom
    • http://files.brookingsmethodist.org/uploads/1/3/1/6/131637316/dcf6fbdf70617c.pdf
    • http://files.studioaase.ca/uploads/1/3/0/7/130740490/gokusodo.pdf
    • http://files.kellykrajeckiart.com/uploads/1/3/1/4/131438541/8147693.pdf
    • http://files.nazarenemissions.ca/uploads/1/3/1/4/131437093/ccf926.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/mugakafomug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4840/files/8017442480.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/espn_nfl_scoreboard.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/91578446311.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/92343093012.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/57789064140.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/gepebudozuvowobipelam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/ludirekeduzarakiwoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/nanemera.pdf
    • https://cdn.shopify.com/s/files/1/0436/5982/1209/files/kunejibapiwipidub.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/67504028718.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e3d.bin
e9f232404ade69fc42758fb08a82a597b22f790002c9caab53a31c03acac7f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3D 5288 bytes
font_01_sfnt_off0000801a.bin
5ee801b8fd7c9a327ef9fd189908098ed6b7489c2f70238dc1940538c06617ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801A 15360 bytes
font_02_sfnt_off0000afad.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAD 4324 bytes

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