Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc659c55255e82ff…

MALICIOUS

PDF

55.2 KB Created: 2020-08-12 21:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0896ce9ca7ee415420d89b5d2cdb066 SHA-1: 383f024967e391aa12d863a31bebe69a6effc4d3 SHA-256: cc659c55255e82ffb4d988184b599be2214a4e9176f83966a6c9190818b0b00a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body contains the same lure text as the malicious URL, suggesting a phishing or scam attempt.

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.ru/pify?keyword=amar+chitra+katha+comics+free+pdf
    • http://rolad.vestedenergy.com/uploads/1/3/0/8/130813420/dupiji.pdf
    • http://files.stfranciscatholic.org/uploads/1/3/1/4/131452733/lalazowatuvam_vajixatilu_darixafanetital.pdf
    • http://files.demusproductions.org/uploads/1/3/1/6/131637679/6666b6e7c9b6a6.pdf
    • http://saxetep.skipsisters.co.uk/uploads/1/3/1/4/131410007/1596827.pdf
    • http://saxetep.skipsisters.co.uk/uploads/1/3/1/4/131410007/15
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/rojedoropurelelinekejep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/nfl_passer_rating.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/business_communication_notes_for_mba_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/cambridge_latin_unit_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/23376917608.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/73586421389.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/rinojotevirege.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/powebijivotezoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/kezexuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridojunewosinojep.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae1.bin
8d39a899c70f787916067ce7b867a0ac7cf14701dd8843afa24c09a84e233905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 5416 bytes
font_01_sfnt_off00007d16.bin
ed20c02060f225e47958a077c60eee16269e9d8f63aa38f5607a6b5c5f953eca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D16 5492 bytes
font_02_sfnt_off00009094.bin
2f44755fc3f63ac68ad6c950707e80fcdb79b21adf51dd4d81ffb576185f3637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9094 12204 bytes
font_03_sfnt_off0000b89c.bin
a8b0c25172aa9b5bc08eee067abf1650770238587142d73506cc124324baa444		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89C 16436 bytes

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