Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7c48dccc149127…

MALICIOUS

PDF

53.7 KB Created: 2020-08-10 05:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66111c589d38b7271a664cc3b90b035 SHA-1: a6fcee19ee946f9fc5ea92759292567c6b5a262f SHA-256: 1e7c48dccc1491278913867d50e5759b10ebda34753f8f20c5db432d1885e1b7
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.com', suggest a redirection to malicious infrastructure. The document body, though heavily obfuscated, contains the same suspicious URLs, reinforcing the attack pattern.

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.com/pify?keyword=etiology+of+meningitis+pdf
    • http://bagowire.nextllcenter.com/uploads/1/3/1/4/131438641/54090.pdf
    • http://files.merrimacohd.com/uploads/1/3/1/1/131163854/4719337.pdf
    • http://files.alyssadanfitness.com/uploads/1/3/1/6/131606461/6011015.pdf
    • http://files.colacotwayartstrail.com/uploads/1/3/2/6/132681378/jefamixizo-zejexelelovezid.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/13416409634.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/tijebivegom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/nawebixazutivelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/89827529827.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8901/files/1539368108.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/26237059326.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/felutibuzenipunabizuda.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/homeworx_hw-_150pvr_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/laravuraze.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/67584286522.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/mogumitifugexenolinowelu.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/social_marketing_articles.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_off00008a92.bin
abafc6a4973763cdd88e7fee60be94fd5d59ada5a52babfa9fd1bfa1cd226d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A92 2088 bytes
font_01_sfnt_off000093f8.bin
bee7ba5c33983edbb2428960bea7baa524538bc1947b4ed1e1bbb84c14f6a375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F8 5116 bytes
font_02_sfnt_off0000a56b.bin
4eb5ea2146b731731c2e88dc772af77adee9da5217a2deb6bea438aaf4dd1dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56B 10696 bytes

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