Malicious PDF — malware analysis report

Static analysis result for SHA-256 9348aa35f8054aa5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 22:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7271ad604d78f491a6e526587f58e43 SHA-1: 7e849eddfb8e9f1d6f7d1cd33a474cf53b631755 SHA-256: 9348aa35f8054aa5ef26918c0df5be5e7cd790f5d7bd85cd4e6c0abd43db6f68
152 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and numerous embedded links, including a critical redirector link to 'ttraff.cc'. This indicates a phishing or scam attempt, likely to redirect users to malicious content. The presence of multiple PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=como+decolorar+cabello+negro+en+forma+natural
    • http://futipugo.tax-preparation-cpa.com/uploads/1/3/0/9/130969059/sukomarodevebode.pdf
    • http://files.carollongpottery.com/uploads/1/3/0/7/130776200/nexobirovo.pdf
    • http://files.toritiscia.com/uploads/1/3/1/1/131164130/vopalenexonesowimewo.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/editor_to_word_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/20568466995.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/php_resize_img.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/28790699404.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/robotic_manipulator_arm.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/popitavavazuwel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/application_of_mathematics_in_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/54856210766.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/2400521947.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/49882799839.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/cuatro_acuerdos_toltecas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/73778321791.pdf
    • https://cdn.shopify.com/s/files/1/0448/3085/1233/files/inventory_costing_methods.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/53542774345.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_off000065f1.bin
2edc736a1a2d7f28d81be31a8cb7627293114190045e9ddf3201c990e86e93ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 5208 bytes
font_01_sfnt_off0000778f.bin
2498d1842f77513beb452a8675a8c8752176fb43d1cff5ae26b00ac2c420fa74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778F 10268 bytes

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