Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77bb9941ab0ee91…

MALICIOUS

PDF

35.5 KB Created: 2020-08-10 01:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad53b10e46b5692bcfcc7cf6ed14df0 SHA-1: fd0c53c9f4dc757fdd257c29e6be036cb9ed484e SHA-256: f77bb9941ab0ee914df66759ea7701762f53ce4fbccac8471c44f586b4617185
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=new+king+james+version+bible+pdf+free+download'. This URL is likely used to redirect users to a malicious site. The file also exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many of which are hosted on Shopify but point to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and the link farm structure indicates a phishing or malware delivery attempt.

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=new+king+james+version+bible+pdf+free+download
    • http://files.inclusiveplaygrounds.net/uploads/1/3/1/6/131606392/puxaxasuj-kumomibozaza-xidazo.pdf
    • http://files.trimfixsupplies.com/uploads/1/3/1/4/131438392/xawametixev-dukoka.pdf
    • http://files.binghamroadschools.com/uploads/1/3/1/4/131407459/runif_pilesuveva_pebukeza.pdf
    • http://zoponu.brightideasled.net/uploads/1/3/1/4/131483337/mumuravozona.pdf
    • http://files.gulliverstravel.com/uploads/1/3/1/0/131070872/juwunojukeja.pdf
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/va_form_10_7959c.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/56443081136.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/55072803424.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/52652324066.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/49603833924.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/wurokewikosuzoliro.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/10347178260.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/john_legen_everybody_knows.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/8331166215.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/wupefebazevoviburowipaben.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/mustang_mtl20_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/61225613969.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/39910032048.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_off00004b3d.bin
4d5ce2f360075c357c3f2521c97f4bef05552a7e5f59b596e657e00ae3e2b3ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3D 5764 bytes
font_01_sfnt_off00005ef0.bin
0e15a34788a72057528f6a91da4de301a9eb6e9ef0d1e62bd97be9d7dd635eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 9952 bytes