Malicious PDF — malware analysis report

Static analysis result for SHA-256 35762d56a164e22f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 17:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf57b89b7d30a806bc75254bd67e76c SHA-1: c65dc0f29a2e1f9b8a3e835e838a981e34df9585 SHA-256: 35762d56a164e22f3914101f80b61469de60b8f713d045117158c62653342784
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a pizza menu. The ML classifier strongly indicates maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', are indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure.

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.cc/pify?keyword=urban+bricks+pizza+menu+pdf
    • http://files.emilyrbarratt.co.uk/uploads/1/3/1/4/131453944/a4e7ed7509af5.pdf
    • http://files.accemployees.com/uploads/1/3/1/4/131453636/53945fae94.pdf
    • http://files.eastersealsnecflblog.org/uploads/1/3/1/4/131437139/xelosobelujag.pdf
    • http://duxekobej.myautologistics.com/uploads/1/3/1/4/131437378/xazunowuxile-kisitubirus-werujiguroz-disafojimuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/69936328760.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/brandy_best_friend_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/5670349601.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/95637820123.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/72292997207.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/84977897308.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/90102255169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedifoniwupub.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/medea_euripides_gredos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/55673457766.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/numofuwumu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/5464491122.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_off000064b7.bin
5b4a4087775f28bacf6adeae33c8145b6e1c691d018596b44dc79d11de35e55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 5512 bytes
font_01_sfnt_off00007767.bin
28bb257daed3b104c21b3e3ed20a2a7ad2e864f0db1b87691598ee2b32baab32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 10692 bytes

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