Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e8ea5a7dfb4846…

MALICIOUS

PDF

48.2 KB Created: 2020-07-15 13:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d323e9d73d245d7942438ffae9db489 SHA-1: 2ec63a328881c78ff34c1c2b2d411956c4a61206 SHA-256: f7e8ea5a7dfb48464f6da6b3665eb745274a2021c1ffd8211d9a7f1be83a22e7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of the primary links points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content for malicious purposes. No scripts were extracted from this sample.

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/wb?keyword=batting%20tee%20drills%20pdf
    • http://files.ftpiercemasons.org/uploads/1/3/2/6/132682042/lituxa.pdf
    • http://files.heartofillinoisorff.org/uploads/1/3/1/3/131379371/9586210.pdf
    • http://files.studentsfortomorrow.net/uploads/1/3/1/3/131382590/semutolorine-zawebexebotese.pdf
    • http://files.mariebyrdsproul.com/uploads/1/3/2/6/132682124/3926344.pdf
    • http://files.deldelorm.com/uploads/1/3/1/4/131409442/feed0.pdf
    • http://files.mpcharmnails.com/uploads/1/3/1/0/131070173/nadasukofinudu_sulefozisigula.pdf
    • http://files.stu-art.us/uploads/1/3/1/3/131383283/7498380.pdf
    • http://files.more-cb.com/uploads/1/3/1/4/131437484/galogi-fozubisomu-bolisuxumer-libasikibeva.pdf
    • http://files.daughtersofscotia.org/uploads/1/3/0/7/130775363/kadegedibapot.pdf
    • http://files.amnestyhouston.org/uploads/1/3/0/7/130775652/c73dba6da85.pdf
    • https://zigexonidu.files.wordpress.com/2020/07/nuzofupitu.pdf
    • https://zurogisola.files.wordpress.com/2020/06/75728284768.pdf
    • https://bekururumema.files.wordpress.com/2020/07/vumebibenudivosogen.pdf
    • https://kojesurobiza.files.wordpress.com/2020/07/62613027493.pdf
    • https://jazezub.files.wordpress.com/2020/07/93509230192.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/fimowafalupivuxexegib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/75884365945.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/semofuxekijinedusad.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/84065499619.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/ziwujuram.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.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_off00008168.bin
97a50382ba4aacce5bc4ab15010d337a36eda8eae742b4c420dcbe0c8a178e71
pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 4936 bytes
font_01_sfnt_off00009237.bin
64bb8414b2f2de8df1bb41ed6b1db0748d3bc17415e5a2b4a34562aa7a12594a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9237 9656 bytes