Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfeda89124fc8b51…

MALICIOUS

PDF

46.3 KB Created: 2020-08-08 00:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f8850af2a8fb994a0cddb09f083ef9 SHA-1: 342f1e8cff98104c25801ee19fc5861add7e7867 SHA-256: bfeda89124fc8b51cb9df45c2c13d495a2744dabcd18ba7ab67cf506e7133d70
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 indicating a link to a known malicious redirector. The document body also contains a URL pointing to this redirector, suggesting a lure to external malicious content. The presence of multiple Shopify URLs, while some are benign, indicates a link farm strategy. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious infrastructure.

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/wb?keyword=gym%20workout%20chart%20pdf%20file
    • http://files.nextcow.com/uploads/1/3/1/4/131408970/zovipoxelenowu_jiruwusetupu_jojowafefi_fasepuwilo.pdf
    • http://files.architexturedance.org/uploads/1/3/1/3/131380626/1645953.pdf
    • http://files.dakotasdogs.com/uploads/1/3/1/0/131069886/d3888.pdf
    • http://metimol.cbconwy.com/uploads/1/3/0/9/130969426/pulovuxesib.pdf
    • http://taruda.finneganswakeupwithcandle.com/uploads/1/3/0/7/130739415/6cbb7.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/chyna_is_queen_of_the_ring.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/luxuvasiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/27985971082.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/predator_generator_8750_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/tuberculous_peritonitis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9463/files/xavojopadikotamijaraf.pdf
    • https://cdn.shopify.com/s/files/1/0453/5566/3515/files/fundamentals_of_electrical_and_electronic_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/diluvuniduwipule.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/34234155301.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/mapisofuxisedekilisazil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/auditing_and_assurance_services_7e_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/13457591102.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/
    • https://cdn.shopify.com/s/files/1/0430/9227/9463/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000759c.bin
63ab28fdd8258b111928217b19dd7a0e4580d9d7f501d40aaa6673eb220de944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759C 5508 bytes
font_01_sfnt_off0000884e.bin
8820b33157227bbe49b5d22b98f5ea989079248855bb0706adafc450c718b63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 10440 bytes

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