Malicious PDF — malware analysis report

Static analysis result for SHA-256 a036307c9f62669a…

MALICIOUS

PDF

56.7 KB Created: 2020-08-09 19:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db79c3f2eabe35fd32de2bf7d0df7a4f SHA-1: b179c766bb587077c915792ae67a51b041b15330 SHA-256: a036307c9f62669a4dc1b9954f5ec90a053c02944f4008040d2db0216d47355e
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking on further links. The document body, though heavily obfuscated, contains text related to guitar chords and the authoring application, suggesting a lure document. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. The primary IOC is the malicious redirector URL.

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.com/pify?keyword=grille+d+accords+guitare+pdf
    • http://files.wildwoodacres.com/uploads/1/3/0/9/130969498/2421831.pdf
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://files.jacobsmalltrombone.com/uploads/1/3/0/8/130813427/c187560c91.pdf
    • http://xebes.advantageincstore.com/uploads/1/3/0/7/130739379/35dda09dd43ba2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4404/files/doropofemurulusadapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/16839317842.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/palidovuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/51456637241.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/51526594166.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/tezabijomuwige.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/rilolesevaxopiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/83415444081.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/bocconi_test_ingresso.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/tigatenawewinogijotilomoz.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_off00008ac2.bin
533ccea83417363586d8c52d4480149c98c3dd87a8ac072bae0170b822c6f958
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC2 5352 bytes
font_01_sfnt_off00009d0a.bin
22c53b1d34ffb86a379001a592c69fb81992353b5815667b7e193c89780f4647
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0A 10348 bytes
font_02_sfnt_off0000c01f.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0xC01F 16312 bytes