Malicious PDF — malware analysis report

Static analysis result for SHA-256 970622dd058bd879…

MALICIOUS

PDF

51.7 KB Created: 2020-08-05 17:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2dd586cfc9b4bc80936bf353f82441f SHA-1: 88a802cc1da99a8ae198a3d65eaef2bd7fafd1a2 SHA-256: 970622dd058bd8797e78bba5d5a54e7d239834e2f73b75edcb3b85abbea8739f
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=amylose+cardiaque+irm+pdf, which is known to lead to malicious content. The document body itself is heavily obfuscated and contains many of the extracted URLs, reinforcing the malicious intent.

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=amylose+cardiaque+irm+pdf
    • http://files.scmmea-9.org/uploads/1/3/0/7/130739937/36cb5d645b89.pdf
    • http://papitojip.kayleighfichten.com/uploads/1/3/1/3/131384281/pokupepume.pdf
    • http://files.forthehonorproductions.com/uploads/1/3/0/7/130740514/7830928.pdf
    • http://files.essense.com/uploads/1/3/0/7/130739747/1257164.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/var_x-_y.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/wujutefujaxoturodidugusez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9021/5073/files/69992963406.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/beginners_piano_song_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/john_maxwell_5_levels_of_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/xajezokewonexozufer.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/wasapojogoxatunijobar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/4136797025.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/35829539192.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/61280997934.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/bulk_density_of_materials.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/sibalomiduxiviboz.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_off00008a75.bin
8c5fc987ca5fab02781d1132e6843f515e82d6d90c8d517d627623d477b814ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A75 5516 bytes
font_01_sfnt_off00009d2a.bin
087448438d203bf28a74fccd5a0968a1d848383201ff006a43b68d781292a7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2A 10840 bytes

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