Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7dcb7ca3f73c0d3…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 08:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 516d780564a3db0e507e34c306695793 SHA-1: 68c1da54049be6892396a2f4c53a5a029c82775b SHA-256: a7dcb7ca3f73c0d3d68cf201d0eae9a7e863de76974ad804c1800a242499a54e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, one of which is to 'static.usrfiles.com'. The presence of a visual download button lure further supports the malicious intent. The document body contains text related to a Tefal Actifry error code, likely a pretext to encourage clicks on the malicious link.

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=tefal+actifry+express+xl+error+code
    • https://static.usrfiles.com/ugd/234f58_a91967c6700641449c3b4a9c971b6d96.pdf
    • https://static.usrfiles.com/ugd/dd6616_8eaba380c1984bfa83cbe424acd5294d.pdf
    • https://static.usrfiles.com/ugd/6d59ab_e87c108ed9ab41a99dcb0370d01390d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_861183074ec84b019bfb727e8f6b6c40.pdf
    • https://static.usrfiles.com/ugd/6f9b04_c4ee052578dc40c1a51786ea444f8e19.pdf
    • https://static.usrfiles.com/ugd/c6ac46_2ab2de5e157442ec83b451d95f3078e3.pdf
    • https://static.usrfiles.com/ugd/de60da_c1fd390f394741fc94066f2dd57fe81a.pdf
    • https://static.usrfiles.com/ugd/49be48_d2b25457fbc947f59c92df58edcc9d03.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/maposodilalojobo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/grossman_cardiac_catheterization_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/brickleberry_season_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/8411669053.pdf
    • https://cdn.shopify.com/s/files/1/0463/2503/9266/files/black_desert_alchemy_stone_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/rowdy_baby_lyrics_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0460/3625/4879/files/68276252419.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/kepefamisugarepulalifupu.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_off00007171.bin
758887bc78f35bc5ae4d5fedcc735d163725818a7831d018a341521005a0c076
pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 5268 bytes
font_01_sfnt_off00008378.bin
dc550450c7639a66337ac5b67955a72a29f489e56c66a4e53e5245ef0043e2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 11180 bytes