Malicious PDF — malware analysis report

Static analysis result for SHA-256 325c295f18e74295…

MALICIOUS

PDF

54.9 KB Created: 2020-08-12 23:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa45e2d6db8736ee90573ff788d86805 SHA-1: da5e79546b061af00cefcf33f3d5d996c0341ace SHA-256: 325c295f18e742953cc9ad6c97dc0ff314471800ff5cc7b370a353cb6c5e89a0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=career+path+cooking+pdf'. This indicates a phishing attempt designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=career+path+cooking+pdf
    • http://files.joblakely.com/uploads/1/3/1/3/131384113/topikarete.pdf
    • http://files.mustangsmend.org/uploads/1/3/0/9/130969942/jurugejawotomot-rewisolazutunu.pdf
    • http://files.purelyinbound.com/uploads/1/3/1/4/131411688/putigez_gunidil_mupopokovijojim_fimenureduw.pdf
    • http://files.czerral.com/uploads/1/3/1/4/131407668/vuxunukukex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2028/files/95828714351.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/ketowurufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4734/5573/files/wetip.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/asset_management_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3562/2552/files/5734319497.pdf
    • https://cdn.shopify.com/s/files/1/0431/1774/0199/files/88492588606.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/38141773786.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/jofirolesikusupobareze.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/bioinspired_actuators_and_sensors.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/28105612008.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/61743202526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/pdf_add_on_internet_explorer_11.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/3162985898.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9741/files/88685681561.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_off000098f1.bin
31c659e1e432ead6c1d10bfbebc63d0af720c7ac6841123f0ef9215576a00032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F1 5176 bytes
font_01_sfnt_off0000aa8e.bin
b6b9dafefafe5f8b09fa7eb3657de776c087f750c0d506781dcd9cdaa7a651f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8E 10572 bytes

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