Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b4164f9dee7dd0…

MALICIOUS

PDF

46.3 KB Created: 2020-08-08 23:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e94833046753bf3475b3ab0cd362d85f SHA-1: d8fc99c6759e2fa3439437fc93cdf4beabaae6d7 SHA-256: 44b4164f9dee7dd0f342e689b7fc828f526cd47abda0bb6972a1a14115865956
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=types+of+catalyst+in+chemistry+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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=types+of+catalyst+in+chemistry+pdf
    • http://files.savvy-logistics.net/uploads/1/3/1/8/131871419/sedizebolonazin-pimomukur-lisurinupalogu-birokel.pdf
    • http://files.wineworldcup.co.uk/uploads/1/3/1/4/131406527/9715972.pdf
    • http://files.theartexchange.ca/uploads/1/3/0/9/130969065/8666906.pdf
    • http://files.wildcraftedoils.com/uploads/1/3/1/8/131857199/vedopaja_mazodoma_diwepit.pdf
    • http://files.yourheartspath.com/uploads/1/3/0/8/130874250/1148581.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/windows_10_sound_themes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/enter_the_gungeon_evolver.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/gawuvofamovegokaroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/wezarugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/2812075838.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/ajouter_un_site_proposer_un_site_fractalum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/livro_auditoria_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/39196530104.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/64107022428.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/mulive.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/toxopu.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_off00006147.bin
b9f7cb29a4cc0dde5960413ccb189428343d3a70f956c7814be93f9348c8445e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 5444 bytes
font_01_sfnt_off000073a8.bin
c76548631b05f10a06fd22744a1b2741acbbe00d06836aaed5bd72ce3a43d93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 9960 bytes
font_02_sfnt_off000095cc.bin
9c288b1f482793e40014943c6705e3f2bda3c8f5e41353329a6900840aba5220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CC 16320 bytes

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