Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aa274cd05ab160…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 08:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a00d0eedea6d4d53a2a31e9cf69a38b3 SHA-1: 8d730f8a8ce443a261d6f0cf9fecdf237e72b982 SHA-256: d0aa274cd05ab160362e765cba3385375411ddd1d56d7ff48f439365745e6cbd
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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to external PDFs, some hosted on Shopify. The document body, though partially corrupted, contains the same URL as the redirector, suggesting a lure. The presence of a 'download button' heuristic further supports the attack pattern of enticing users to click malicious links.

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=chalkboard+handwriting+font+free
    • http://files.hephaestus6390.com/uploads/1/3/1/4/131407281/redeloregazemewos.pdf
    • http://files.lifesafetysolution.com/uploads/1/3/0/7/130776015/d87d02fab11dae.pdf
    • http://files.harperfolsom.com/uploads/1/3/1/3/131382092/2462424.pdf
    • http://dareb.refugefriends.org/uploads/1/3/0/7/130739196/fosemokirovarez_gowewi_niwovexu_fisurofu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/70113527093.pdf
    • https://cdn.shopify.com/s/files/1/0439/1151/2232/files/mevuxikufekasox.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/soundhound_music_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/todukegutumuvitibemiki.pdf
    • https://cdn.shopify.com/s/files/1/0462/3777/8071/files/70719789189.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/labotid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/45352109921.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/geometria_descriptiva_arquitectura.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/37889194440.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/65393661532.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/82181647517.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_off000062e8.bin
e623546fcc7584a3f3df7856e6571bbeb82fbfde7292194406dcdf18e0927b34
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 5192 bytes
font_01_sfnt_off0000749d.bin
94e895d567cda928ef00b3926ff55b249108448ddf845f5b8563e27a9579b971
pdf-font-stream PDF embedded font (sfnt) at offset 0x749D 10172 bytes