Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e9bf859cbfedef…

MALICIOUS

PDF

37.5 KB Created: 2020-09-01 16:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f091ba5ecba42be71c20a6d2ad755df SHA-1: 10279e489a7c427ee8a6c40778e257cf54465519 SHA-256: 54e9bf859cbfedef3d86b457462050f806cb0407dd51effb374ea02d12aaaca9
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=reliability+theory+and+applications+pdf', suggesting a lure to download further content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=reliability+theory+and+applications+pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/manual_de_arqueologa_colombiana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/nicole_brown_simpson_the_private_diary_of_a_life_interrupted.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/92099411786.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/l_e_d_full_form_in_english.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3f4ffc037cf6414985a9029dabb5b57b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
    • https://static.usrfiles.com/ugd/6a7407_699c23b30cd84c8f99f466f4a58b126a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_c269525d350b4304b69fbf8c22a5b378.pdf
    • https://static.usrfiles.com/ugd/69695d_d26f0c5aa25640e78d3ad5f663634e16.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/yamaha_htr_5940_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/pukorusu.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89d68849be6470da648a9c094566a68.pdf
    • https://static.usrfiles.com/ugd/47b1e8_5c11e76256bc49fb91a83809ab63310f.pdf
    • https://static.usrfiles.com/ugd/b8c837_40b0e2f330ed48b687c04fd0fa65e47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8a3b5f26b1c43e3b0c78f03e4a0e224.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_off0000550c.bin
8f1ae79e3ac45baf9d6c80d7000697c426be7ff30d96ddf5545b3283d509dd2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x550C 5492 bytes
font_01_sfnt_off000067b4.bin
84349aa91e30352762b308eb40dd32552f8c4e238f36357561078eccfa71b6c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B4 9740 bytes