Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba68ebee58080d8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 11:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49a283a80e066daebd80be2dbf1ebaa1 SHA-1: d855a2cba8e9ad042a77f2875d6fc159f67a0ab2 SHA-256: cba68ebee58080d851c70d7780b4916dad0a26c423adaa739ea094a1210ae7fc
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 'https://ttraff.cc/pify?keyword=yard+yahtzee+score+sheet+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to these URLs and a 'download button' lure, suggesting a social engineering attempt to redirect users to malicious content.

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.cc/pify?keyword=yard+yahtzee+score+sheet+pdf
    • http://files.fatdtogo.com/uploads/1/3/2/6/132681194/farijuberifep.pdf
    • http://files.maaemi.com/uploads/1/3/1/8/131858661/simimusepaw-kolenar.pdf
    • http://files.mushinmovement.com/uploads/1/3/2/6/132695531/doxelofajofos_nejilosoz_lapenowubop.pdf
    • http://files.wildaboutwampum.com/uploads/1/3/2/6/132695568/naposu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/hero_bike_spare_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/fumofetafamerosijiginafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/88047610161.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/15513625779.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/93687241464.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/govefaxejuzepewix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/216551558.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/60168210044.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/buvigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/gotakogavuxagagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/88777353940.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/miles_away_mmf.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_off00006333.bin
9077a1dcfab67ad75792904966e35e776464d67477df679c58f755111415c9c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 5324 bytes
font_01_sfnt_off0000755d.bin
d200b720ce5c949904f53b4db4576095ba879693f52eb2486b8a1f59a0ca6085
pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 10484 bytes