Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2159453c4e7d31…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 06:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bc52ff585be0793389094c065327840 SHA-1: 9e474c2a5f87fa624edde2c9fb90e96c72f2f42f SHA-256: 8e2159453c4e7d314d3c2d0b83c2f8f944bdd87e4caa203e5758aa0d654d8888
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links, one of which points to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text fragments related to 'mac powerpoint pdf file size' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination.

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.com/wb?keyword=mac%20powerpoint%20pdf%20file%20size
    • http://kotin.msdanielledobeleit.com/uploads/1/3/0/7/130775162/1445057.pdf
    • http://files.turkishinstructor.com/uploads/1/3/1/4/131453943/kofutewabafisega.pdf
    • http://files.mrlennonmusic.com/uploads/1/3/1/4/131406735/zebajurakesibap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/xoromizaxuwuzuzupusewu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/statistical_rethinking_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/11215438524.pdf
    • https://cdn.shopify.com/s/files/1/0436/2131/8820/files/pafajunenevopezoxurej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2231/files/zorawugizikak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/airfix_model_world_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/59810297004.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/fubeniruwulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/60948225701.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/rusumoberotemur.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/75224099982.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/mukubedoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/35459446823.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/megugujowojil.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_off000073d4.bin
b3378d04a9d1d18bcf7d25b63e4369cfb34e472bb8f5d7e645cebbad628bf081
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 5296 bytes
font_01_sfnt_off0000860f.bin
b21b07f5dae37409e1a9ce907a1388ba12e09baa686ef9629db366aeb71fb7e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x860F 10540 bytes