Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76426ce853c401a…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 18:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a85daf0cd25c4f26c69010f3b999c7 SHA-1: 42075ee4adf2ff7ae2148b8d03e442e5d0110da8 SHA-256: d76426ce853c401ac52e58613e2441f2d492c87dd57cdbc561a5566c3e97bca5
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a 'quantitative data analysis journal pdf'. This link points to ttraff.ru, which is flagged as malicious. The document also contains a mass external PDF link farm, with many links pointing to Shopify domains, likely for SEO poisoning or to appear legitimate. The presence of a visual download button lure further supports the deceptive nature of the document.

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/wix?keyword=quantitative+data+analysis+journal+pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/cernobiljska_molitva_knjiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/zigategizevezekesemos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/explosive_materials_used_in_explosive_forming.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/oxford_online_placement_test_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/microstrip_patch_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/how_to_download_python_and_pygame.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/division_of_polynomials_by_monomials_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/81744234630.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/bingo_video_maker_apkpure.pdf
    • https://static.usrfiles.com/ugd/39cb9d_e59873538c30462cafdeb27b317a5225.pdf
    • https://static.usrfiles.com/ugd/a91264_43ab809e2b134a84b2ef7dbbb07d2057.pdf
    • https://static.usrfiles.com/ugd/b8c837_bad49abe751b4e6fbf4d31c8e0ebd9e1.pdf
    • https://static.usrfiles.com/ugd/b98abb_d611bb9b79004386ac21372e65762b32.pdf
    • https://static.usrfiles.com/ugd/0049ca_c4f0175a6049454c9103e8481fff5c81.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_off0000606b.bin
bd57b01a0c74376e3175876cd40fa6ab591d7844646fbaa98c0dfede7350e6b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x606B 5336 bytes
font_01_sfnt_off000072b0.bin
d25aba91cfbecc553fe98ae24b5faeaaa051f189512d42e5f37f2aa65c9413a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B0 9692 bytes