Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14c3389740080b2…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 07:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1369858b6452712f5b7dd78beb65646 SHA-1: 00b81dd992287ca5e08e9b60f3e8bbaf4f32d1ae SHA-256: e14c3389740080b2b20a7db6a474b367f7e26333cf8efbc5913bdeada876fef1
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high ML classifier score and the presence of numerous embedded links. A critical heuristic detected that these links point to a redirector infrastructure, specifically 'ttraff.ru', which is likely used to obscure the final destination of the malicious payload. The document body contains text related to 'define branding pdf' and embedded URLs, suggesting a lure to entice users to click on the malicious links.

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=define+branding+pdf
    • http://dubopesu.montanagovcup.com/uploads/1/3/1/4/131452821/2304557.pdf
    • http://files.cxgreenworks.com/uploads/1/3/1/4/131438539/powonef.pdf
    • http://files.antiquequilthistory.com/uploads/1/3/1/3/131379181/8305556.pdf
    • http://jitab.archieart.com/uploads/1/3/2/6/132681670/77ca728d.pdf
    • http://files.urbanag.info/uploads/1/3/1/4/131438142/wekaxuminageki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/jang_newspaper_22_september_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/dimilezerofifijeleputenot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/jubirelajiwejogenemuje.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/81028955577.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/55808192663.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/88976059473.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/adobe_photoshop_tutorials_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/60053310532.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/65963558704.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/zasejusifixowod.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/xojazigewiwijesagefotapet.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_off00006b51.bin
cf92f22b966c9034d194abc380c8acad9b23037627ce91a5bfa34cc8aee01791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5136 bytes
font_01_sfnt_off00007cda.bin
71a167e85eac36d9b30f9b46b42dca909b9f8d00ad19bef4dd9c4ebaa2281d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 10188 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.