Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6c323ea6ed34e5…

MALICIOUS

PDF

64.3 KB Created: 2020-08-11 09:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2e68d8bff77fc5620cca782b71f829 SHA-1: c0fbeacd30915842117d6edf57ba239cec7cffe9 SHA-256: ed6c323ea6ed34e506c9ea73d07c14b03b631b9fefa9dd7152cc56ddabc2bb45
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier also 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=beware+the+dog+roald+dahl+pdf
    • http://rawevufu.dontcallmecameron.com/uploads/1/3/1/4/131453133/4280364.pdf
    • http://files.divewithsteve.com/uploads/1/3/0/7/130740191/d76a07e2fee.pdf
    • http://files.judithhand.net/uploads/1/3/0/7/130776809/dinovuvizolej.pdf
    • http://jevarizo.scoilursula.com/uploads/1/3/1/3/131398091/sewogokusatofo_fegusa_kevatotir.pdf
    • http://files.firespicesmokehouse.com/uploads/1/3/2/6/132695399/754460.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/juvirojodeluvajesokikof.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/vilimejesanusurusoxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/honey_bee_production_system_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/celebrity_endorsements_a_literature_review_and_research_agenda.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/27245383393.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0406/files/capteur_de_pression_d_huile.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/53154727175.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/xiwaziwovevomojususave.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/56355268319.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/29135165737.pdf
    • https://cdn.shopify.com/s/files/1/0453/2230/5691/files/44345844606.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/76996849891.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1c8.bin
0131b9a383cb8b395b51d64e9901bb7a2b21168add79f3317557e01264a59bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C8 4900 bytes
font_01_sfnt_off0000c2a1.bin
9b5e5a3cdce9b418fc402a3b085abe5c7451a1f498b17c6c2c333087fea94886		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A1 10240 bytes
font_02_sfnt_off0000e5b9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 4324 bytes

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