Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e58655b41d870e…

MALICIOUS

PDF

38.3 KB Created: 2020-08-12 12:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec641f8a2c2c483453434ca3550fe45a SHA-1: cf30b0f996bcbd7ba6dc56338ee32514b422bb52 SHA-256: d0e58655b41d870ef91f124bbe00f3eff8849076858b90c392fade896de09286
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sri+bhagavatam+telugu+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly supports the malicious nature of this PDF.

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=sri+bhagavatam+telugu+pdf
    • http://files.listerpartyrental.com/uploads/1/3/1/3/131384604/vipagerutalujeg.pdf
    • http://files.baptistegerbier.com/uploads/1/3/1/1/131163859/rojuserota-fitemujan-govapulogopu.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://balil.whimsykeywest.com/uploads/1/3/0/8/130814328/c97cdbc1306.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/80258065186.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/86194812734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/ti_84_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/varisamewaguzatop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/xerideba.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/bayesian_point_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/bulapovilokedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0449/2325/6999/files/neumonia_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/fotukenekijove.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/bgg_behindertengleichstellungsgesetz.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_off00004ab1.bin
14d29f5e438e765cc57bf409dc1278a36a1022ea7997a80cc6f9cfd42ecba228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB1 5248 bytes
font_01_sfnt_off00005c88.bin
242d8106ae21e8a04c8df892dbceba2424d95696fcd665835d1a3d652d553526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 9796 bytes
font_02_sfnt_off00007e0b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0B 4324 bytes

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