Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0f087a72faad39…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 10:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a09a7c248e9b359f37875e80894e1bc SHA-1: 2d1e6e96eee475848e04bc2f7d2108a2264bc480 SHA-256: 8b0f087a72faad39827a06152965dddf00f06ee4df0017ee107ff5ce89b4a7bf
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=workforce+management+in+call+center+pdf`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to this malicious site. No scripts were extracted from this sample.

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=workforce+management+in+call+center+pdf
    • http://files.boutiqueitwithme.com/uploads/1/3/0/8/130814636/jevozededozaber.pdf
    • http://files.lusage.org/uploads/1/3/0/7/130738513/xedepawebolezibewofo.pdf
    • http://files.flyhiluv.com/uploads/1/3/1/4/131482941/giporinej-zewoza-kotopig-fizebizowifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/19645290344.pdf
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/pdf_to_dwg_converter_online_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/63691509934.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/xugimoritatemobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/xajiloziriv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/buxofu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5844/3941/files/bernard_lewis_crisis_of_islam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/xurekofukokesadajaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/php_multiple_files_upload.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/fumovukakawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/20930484640.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_off00006d28.bin
4bae2c130f131294963f9dcf1bd056f41d726830f44e1350c7812d753f4e1dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 5376 bytes
font_01_sfnt_off00007f6b.bin
81aeec47b94364edb7a8c8b78aad0e0be86990b075dc57587e8250747106841f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 10724 bytes