Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26c37656dcc0c83…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 23:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ece701ab7769656ed72d4fbfb540fa SHA-1: 4098247858f170659e9d6541ad4add676c6943cd SHA-256: b26c37656dcc0c83cd4fb20a438ba29ff5b879484ea9f127a24f6d103868761d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This link is presented in the document body, likely as a lure to download or navigate to malicious content. The PDF also contains a large number of links to Shopify domains, which is indicative of a link farm used for SEO poisoning or to obscure the true destination. The presence of a 'download button' heuristic further supports the idea of a deceptive download lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bk%20precision%202120b%20oscilloscope%20manual
    • http://files.surfcoastarts.com/uploads/1/3/1/4/131454850/tovuxukedilijin.pdf
    • http://molovor.embodimentcollective.co.nz/uploads/1/3/0/7/130775164/kepelisufafokewimo.pdf
    • http://vojevufof.astrobrandmedia.com/uploads/1/3/1/8/131871991/nuzazesenej.pdf
    • http://xidilo.kcrkradio.com/uploads/1/3/0/7/130776688/d57b9ccacd55f.pdf
    • https://cdn.shopify.com/s/files/1/0428/0467/4727/files/adverb_clauses_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2163/files/56414743811.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/entrepreneurial_skills.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/stihl_ms180c_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/7779/3960/files/20090712534.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/84735207135.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/xifabijozuxuga.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/calculus_and_vectors_12_mcgraw_hill_ryerson_chapter_4.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/mgsu_bsc_1st_year_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/zonojosevamuxedawam.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_off000052af.bin
7a7cd534545352ee13e6596ac70ab888a7c9ab3394b6d7efce6dee7191231412
pdf-font-stream PDF embedded font (sfnt) at offset 0x52AF 5460 bytes
font_01_sfnt_off0000651f.bin
4fcdfc2f0c964f8dacab64c9fdd8a09a5c612bb91220553c83c26de82ea07212
pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 10532 bytes
font_02_sfnt_off0000890b.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x890B 4324 bytes