Malicious PDF — malware analysis report

Static analysis result for SHA-256 22296d122eba22bb…

MALICIOUS

PDF

50.8 KB Created: 2020-08-02 14:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7eb80e0d281ede82048a6bad9019b04 SHA-1: 0978551fdbd669d5ffdbc57a1cae0669716af9bb SHA-256: 22296d122eba22bb072fd443bac142be54762a897e7df3feb3687db86b07f09e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=stardew+valley+id+list. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of many links to external PDFs, some hosted on Shopify, indicates a link farm strategy to obscure the final malicious destination.

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=stardew+valley+id+list
    • http://files.evolvemassagewellness.com/uploads/1/3/0/7/130776661/mumujeradujamuxanifa.pdf
    • http://files.hitchhouseusa.com/uploads/1/3/0/9/130969265/nuwixudapulezu_numozupolabeb_banubexilo_wiravefodogevu.pdf
    • http://files.horizonbrews.com/uploads/1/3/0/7/130775892/suminapu-subov-vugovebusasepew.pdf
    • http://files.510warrenstreetgallery.com/uploads/1/3/0/7/130738894/9723808.pdf
    • http://files.northwoodsyouth.org/uploads/1/3/1/4/131483147/lisirebo-wisisupajel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/pesapifelenodujez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/dafapizedozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/37897992908.pdf
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/kefaboxago.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/torutisagadaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/vuzaxev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6466/files/puzugewenupomegawitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8958/2487/files/edit_current_website_bookmarklet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3950/7100/files/zajirasifutogobab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/1046614744.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/tidujetuwusuda.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_off00008951.bin
070595cd240ce8f475732717be7526a73f4eecc59248248d9c77c73a021cbf14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8951 5176 bytes
font_01_sfnt_off00009b12.bin
8646e5612bcc159d8e68754abb0ce6e1256db10825422457103d837d8d1af793		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B12 10496 bytes

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