Malicious PDF — malware analysis report

Static analysis result for SHA-256 27db017481df75cb…

MALICIOUS

PDF

69.1 KB Created: 2020-08-12 08:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f07de28dac2dcb7602ede6004772f7 SHA-1: ca97fb9e0039e4d8188a6bf78528e1b47743012b SHA-256: 27db017481df75cb554342b321e61d6aabec8857b45661c4e95ecebf725ef774
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=cedaw+treaty+pdf', which is also flagged as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to disguise malicious content.

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=cedaw+treaty+pdf
    • http://files.kbshoppingcenter.com/uploads/1/3/2/6/132682204/7668861.pdf
    • http://files.multidimensionalchromatography.com/uploads/1/3/1/1/131163955/kuxelifaxevuji_rutudobiso_vigidazik.pdf
    • http://files.raisethesteaks.net/uploads/1/3/0/7/130739415/rajubijelu.pdf
    • http://ledofari.florosstylianoumotors.com/uploads/1/3/1/0/131071252/a461fe980107fb9.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/harrison_cardiologia.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/pathophysiology_of_pulmonary_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/gonagesifojasobitave.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/dilodufavusex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/jiziwapewuxosemetimole.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/batman_the_dark_knight_returns_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/fewen.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/wimubewubufapal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/75017431685.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/jedizad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/mosuvamewadewubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/fixewumifoxomoduseviv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/3248667581.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_off0000d360.bin
0d45cd501f06c2245b00cdb206a43259b6d155e5a534062e524e1aa34687f266		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 4924 bytes
font_01_sfnt_off0000e44c.bin
f6f528116c6ef4402b71eb7e77337928645ffc89763f00a54cbc84888916a2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 10160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.