Malicious PDF — malware analysis report

Static analysis result for SHA-256 be212fa005c73678…

MALICIOUS

PDF

39.1 KB Created: 2020-08-22 06:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff14b1c6c5523779f2fdc43965f19a5 SHA-1: 7add7eb5f8ac39c59293fc4da5e8a88d281975d5 SHA-256: be212fa005c7367828ebfa413fe94bcafdc4a24cf30e22158673e170bd4f916f
150 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 firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The primary purpose seems to be directing users to malicious infrastructure through a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=monitoring+and+evaluation+pdf+files
    • http://boxemesar.ecodecobali.com/uploads/1/3/1/3/131379410/e39575.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/das_extubation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/kebiponafanetinozatojib.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/92723185251.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/47392750891.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1678/files/gebiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/fesusasekage.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/gelaboxasuvoresaxutiziket.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/wilometuxogagilimifoziv.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/kekojok.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/8577509738.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/10747941420.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/watch_madea_goes_to_jail_the_play.pdf
    • https://cdn.shopify.com/s/files/1/0460/3025/8335/files/wow_warlock_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/pathfinder_core_rulebook_free.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_off000058f8.bin
f16a8dc96cdbf8b63084d99f1113e52d9db7f2fdbbdb2c7ce6cc6b1d49c90918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F8 5272 bytes
font_01_sfnt_off00006b0a.bin
e587b89f7e61a41dc71f8a7550e0af53b63a258c211b88cfa32cd639f90d0933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 10712 bytes

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