Malicious PDF — malware analysis report

Static analysis result for SHA-256 5610c896e26d103c…

MALICIOUS

PDF

46.9 KB Created: 2020-07-29 11:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc690a384c6fcf7002b7b5c9b90ac4bf SHA-1: f9b319fbf7fef30f70eda68e8fda4f5799f5d92e SHA-256: 5610c896e26d103c688325e6df447574c7ca157091b15366efddfce9576848db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one pointing to a known malicious redirector (ttraff.ru). The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be related to SEO content, suggesting the links are part of an SEO poisoning or phishing campaign. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=desercion+escolar+en+mexico+2020+pdf
    • http://files.visualtommy.com/uploads/1/3/0/7/130775484/9001035.pdf
    • http://files.andywilsonmusic.net/uploads/1/3/0/8/130813985/xuvafaninopoju_ratuwuxenote.pdf
    • http://files.patriciastuartnspires.com/uploads/1/3/1/4/131411147/litixoxivez.pdf
    • http://files.advocatesfordiversity.org/uploads/1/3/0/9/130969809/muduvonix.pdf
    • http://files.keganphotography.com/uploads/1/3/0/7/130775403/72baa16e7d.pdf
    • http://files.patriciastuartnspires.com/uploads/1/3/1/
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/17807082852.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/42660702819.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/71501965998.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/xarazorefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/jevigavarovetesuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/13755672411.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/86919202940.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/45519083538.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/fukubuw.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/vizat.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2918/files/jaruguzakedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/memurum.pdf
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/89830407594.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/lenijaxu.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_off0000769a.bin
f1d8c92992999e0ccd24552150614a842bc141ae6176fdf29ca615a9da5807bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 5348 bytes
font_01_sfnt_off000088a0.bin
839a72a9cc07f04183ae2d6b14fda9e5541840949922f9b4f617ec0d5cbfbfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A0 11388 bytes

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