Malicious PDF — malware analysis report

Static analysis result for SHA-256 3600d537a7dfbd7d…

MALICIOUS

PDF

37.2 KB Created: 2020-08-14 19:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5997d8f13f27c335865316ec567a9b5 SHA-1: a8276382b1d418355d75ac808b9aa49cb1c657d5 SHA-256: 3600d537a7dfbd7d4624edb1e98164b02457927090dd44b95c2f2ceedf2c1916
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=country+war+battleground+survival+shooting+games+apk'. This indicates the document's primary purpose is to redirect users to external content, likely malicious. The presence of a large number of embedded links, many hosted on Shopify, further supports the idea of a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious.

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=country+war+battleground+survival+shooting+games+apk
    • http://files.miketaylorphotoarts.com/uploads/1/3/0/7/130775647/felabutujakufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/75129934196.pdf
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/miwuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/bowafofogazexuwamorodojar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9259/9193/files/linesejipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/vosugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/68474649822.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/59691936414.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/gst_tax_rate_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3070/0455/files/92618113860.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/frases_cotidianas_en_ingles_y_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3621/files/samizajozifenez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/nolavomoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/9118/8117/files/dakenikebelajaxa.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_off00004557.bin
88140e26e51eb4b071faa39a645d99c33aebf67fb8f35d695234e1fa1ff81c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4557 5736 bytes
font_01_sfnt_off000058c4.bin
0b34eb16e86484c84bf17e34387f73df2af5f19ee2cf11a36206a63f3e7ac17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C4 9584 bytes
font_02_sfnt_off0000798d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798D 4324 bytes

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