Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9a8383ebd8cb78…

MALICIOUS

PDF

71.8 KB Created: 2020-08-07 08:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8641bee120ef53df8935bf19382ccd SHA-1: 08262f075d7db58bca9d4b48d8b5bbed30755426 SHA-256: cd9a8383ebd8cb78735d8458632c164d32169fcc3eb08a5606a67eb170c82d87
120 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a helpful resource. The primary heuristic indicates a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'ttraff.ru'. Additionally, the PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic, with numerous links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=arabic+to+english+phrases+pdf', reinforcing the malicious intent.

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=arabic+to+english+phrases+pdf
    • http://files.stmatthewsvoorheesville.org/uploads/1/3/2/3/132302710/a6d2ddb.pdf
    • http://files.thevintagebarntooele.com/uploads/1/3/1/4/131406390/561124.pdf
    • http://files.garlinstainedglass.com/uploads/1/3/2/6/132681517/donidir.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/69841064906.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/85972780092.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/xerez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/fupozuzamowetotomifoxon.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/kowasigibopufonol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/fixiruxifixixemavelop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/harbor_freight_owatonna.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/zewovudibimijumusol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/11024422680.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/application_letter_for_job.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3419/files/zobelaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/karimi_aflatoxin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/24887186996.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/poripekiko.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_off0000dade.bin
a654328cecbe13cb571820ddb283ee66624ebeba38528d30a3e00180f59ca941
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDADE 31092 bytes
font_00_sfnt_off0000a27c.bin
fca81700d94b478230230630b2ac9f8c519124cee5cad4e2d11f34e66044c7a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA27C 5544 bytes
font_01_sfnt_off0000b547.bin
7ef5c34f080c0d973d457c23486257e625253b35314de6d04e854d72e5c95a9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB547 11320 bytes