Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71efd3cc0332125…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 23:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f4f4e8bd6bee1d77e089f19368568e9 SHA-1: 2b274d0b169c0ab5c7f1004e58d2b3bc72a8c955 SHA-256: f71efd3cc033212582b3f48a5bcfbccc672f6488c85b4cd112671d8ba477d556
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a 'Bose soundlink mini 2 firmware update' and includes the malicious URL. This suggests a phishing attempt to lure users to a malicious site under the guise of a firmware update.

Heuristics 3

  • 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.
  • 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=bose+soundlink+mini+2+firmware+update
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://rokifogu.80sprom.com/uploads/1/3/1/4/131452977/fipozudono_lozefadog.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/48126236085.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/leather_duffle_bag_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/vopewaxatabuwavuxapibudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/52069782013.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/cooking_guild_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/61319245129.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/2002_yamaha_v_star_650.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/polymorphism_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0438/4299/4336/files/catalogo_price_shoes_importados_2020_con_precios.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/30300893981.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/6620480451.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/health_benefits_of_cassava_leaves.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_off00005da6.bin
4c9534456fcdbd79092e1c636d644bd4dd0fd845ca9c3ab7644ba6dd41919ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5524 bytes
font_01_sfnt_off0000706d.bin
b14bc9573f3ba6c4b8c63985c16f4799b0413e18fa3eb819913dc3b08540af2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706D 15756 bytes

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