Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c6afaa2c177822…

MALICIOUS

PDF

53.0 KB Created: 2020-09-19 03:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 891e927389ff555d09547ac600f3ea8e SHA-1: a60462b2a8201897a26e307dcaa4d6be55afbc2e SHA-256: 38c6afaa2c1778227dee289955126f3087c509ee548636e4d1beb2c755072999
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The primary malicious URL is https://ttraff.club/wix?keyword=nanh2+and+nh3+reaction. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf. The presence of a link farm suggests a phishing or scam attempt, aiming to direct users to potentially harmful content.

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.club/wix?keyword=nanh2+and+nh3+reaction
    • http://zibuxox.hawaiiraingutter.com/uploads/1/3/0/7/130776279/revida-verenivipenubaf-botuvevupozi.pdf
    • http://files.thsvolleyball.com/uploads/1/3/0/7/130776526/2c58a62408cf.pdf
    • http://files.rshroff.com/uploads/1/3/1/6/131637255/dikogepik-ragexarufutebe-lawujet.pdf
    • https://7185c333-7a9f-4277-b2fc-23cf19ac244a.filesusr.com/ugd/95ea6b_db05d62985a54afa8b9c7e6841816422.pdf?index=true
    • https://7dbd0ebf-e042-40db-98fa-ccbf32320a7c.filesusr.com/ugd/33ab24_f2e10e998fb24185a9cdfbac73eb1c88.pdf?index=true
    • https://fc31db7a-c4ce-41af-9a3a-8fbdb1fc844a.filesusr.com/ugd/fac845_f3c4888223394058a6285b8d39554dbe.pdf?index=true
    • https://cc514d96-0214-40f7-8912-53fb10e31eda.filesusr.com/ugd/93971e_706ef6029d2b4ee59a5ed26807381142.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/7505/8329/files/91806117566.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/45473952559.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/happy_new_year_song_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/77317547077.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/parafekebobejez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/kuwegikonukagarab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/the_settlers_online_combat_simulator.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e0.bin
b9c1bd2281f23f09d905494077011cda678d8ff8a20e62f41a46584ce81a564d
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 6492 bytes
font_01_sfnt_off00007a15.bin
40f4fc1774526b86a080221229f6470784053b3366db1e645c230e71848d3a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A15 4868 bytes
font_02_sfnt_off00008a8d.bin
e0a683146cf5ad81ed79bcf5e11bfb7bfaff824954e846fae6f02042f0ff6508
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 14504 bytes
font_03_sfnt_off0000b84e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB84E 4324 bytes