Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e56356243dc857…

MALICIOUS

PDF

52.6 KB Created: 2020-08-11 14:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac0b2b081e4c21f1ec14801130a4c245 SHA-1: 976419720d341c8a8eeeeec22feeff5a3d002e22 SHA-256: c5e56356243dc857416a5132fb6f4a0052253e6228336556fe7e326d4a304505
150 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 link to known malicious redirector infrastructure. The primary malicious URL identified is `https://ttraff.cc/wb?keyword=bible%20kurdish%20pdf`. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external content. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=bible%20kurdish%20pdf
    • http://files.smalltownpopup.com/uploads/1/3/0/7/130739274/f428bf54.pdf
    • http://files.projectdental.org/uploads/1/3/1/3/131379724/faxupewafato_sevimitajus_gomipivari_sabekoboxurevur.pdf
    • http://kadupijev.northernstarbounders.com/uploads/1/3/0/8/130813821/dipekelezar.pdf
    • http://files.stohrdesign.com/uploads/1/3/2/8/132814972/4595521.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/73713884322.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/tufibes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/minecraft_creative_servers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/yesterday_andhra_jyothi_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32506959796.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/read_the_walking_dead_comic_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/10238384598.pdf
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/da_7222_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/29340310760.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/1678219153.pdf
    • https://cdn.shopify.com/s/files/1/0450/3424/2198/files/sowodewuvotur.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
stream_005_off00009c19.bin
4e658efc7117aceab1e7ecf8d51088a513a67c060001b70d925f01006af016ae
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9C19 24576 bytes
font_00_sfnt_off00006351.bin
3bcf9870f92c982b7c17a8a07d03e87fd3dde878ba73b232ae4b4d15425b14fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 5172 bytes
font_01_sfnt_off000074d4.bin
c912d3f113cffe5722cc4fcebf9707b8f660f19a7a86892d486aec61985799e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 12128 bytes