Malicious PDF — malware analysis report

Static analysis result for SHA-256 28713a14ed8aa152…

MALICIOUS

PDF

108.1 KB Created: 2020-08-06 18:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa8e5d1c4ecc5362b4669902a86400f SHA-1: 937fce54269686f9ff7c43a2c053f29a64f4f43a SHA-256: 28713a14ed8aa152726af1fb0d9998095cbbe4d7cde2938c99f7716d797a3a34
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=role+of+arab+league+pdf'. The document body, though heavily obfuscated, contains text suggesting a lure related to the 'Arab League'. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or content-spinning operation designed to attract search engine traffic and distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=role+of+arab+league+pdf
    • http://files.rooftopyogalisboa.com/uploads/1/3/1/4/131438111/pomume_fogorasarirawog_zitixufixi_rudofudibike.pdf
    • http://files.translink.net/uploads/1/3/0/7/130740044/975dc.pdf
    • http://files.oberonmassage.com/uploads/1/3/0/9/130969572/b71ba.pdf
    • http://files.haileegibbons.com/uploads/1/3/1/4/131483386/1acbb3e6c1d329.pdf
    • http://mimiz.holdingworx.co.za/uploads/1/3/0/7/130776485/5664134.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/nisamuwazekokatisinebit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/6663889362.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/puzatagetifu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/35470138166.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2840/files/1552094278.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/52830200804.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/54044375298.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/7328089427.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/gmail_search_operators.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155fc.bin
9a1eeddc64a85e83410ee27125bfdd2c39d32739d603f95b6f8ca0783d9f76e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x155FC 5180 bytes
font_01_sfnt_off000167ab.bin
893d219d5fb236d1cf6d7937ca93346625614d39316334c2bd7bda8bc1a65e28
pdf-font-stream PDF embedded font (sfnt) at offset 0x167AB 11252 bytes
font_02_sfnt_off00018d63.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0x18D63 16204 bytes