Malicious PDF — malware analysis report

Static analysis result for SHA-256 4564dafc22431b48…

MALICIOUS

PDF

45.5 KB Created: 2020-07-27 14:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca69b75808a4381180b69d1f967c3ec SHA-1: 2ed25398b936837793eb2375df07a0a4dfa9c46b SHA-256: 4564dafc22431b48c3392f325ca70f6faddb778ca99de5b55d22b7c56b3a5b0f
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a 'Unified carrier registration form 2019 pdf' lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.ru/pify?keyword=unified+carrier+registration+form+2019+pdf
    • http://files.ramiea2uri.com/uploads/1/3/2/7/132710795/3723186.pdf
    • http://files.masterclassbudapest.com/uploads/1/3/1/3/131398259/delirobufukoxis-rudovizikelex-nulomigeforudid-kulapenefeba.pdf
    • http://files.cantonfitnesscenter.com/uploads/1/3/0/7/130775658/a554f.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/34830704481.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/xupivepevikokolegedireg.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/74306781127.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/fapup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/9014645382.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/ponajaxuzifavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/78731425696.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/biwapiliter.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/28863733708.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/34394450817.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/92818880038.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7804/files/6284837411.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/19038019801.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_off0000713d.bin
ef64285bfb6cfcc3c4c259223d1db33de07002ce2182010221c15b63d32cd03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713D 5704 bytes
font_01_sfnt_off0000848a.bin
9ad790f7b3c4f3c73ecab27b12be400534d40891d4715775ef4e4d7159af914d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 10604 bytes

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