Malicious PDF — malware analysis report

Static analysis result for SHA-256 f941a6a54da8bde9…

MALICIOUS

PDF

54.9 KB Created: 2020-08-29 05:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88674060b1bc815fa50822ad1dddc48e SHA-1: 3ffe5cefc44416d48b356b200d6d65635c29509d SHA-256: f941a6a54da8bde9340632f962db830f43e0e0cbfe73803df5bb480d4ab94471
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=nier+automata+short+story'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious infrastructure.

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/wix?keyword=nier+automata+short+story
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/39318028595.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8969/files/balanced_diet_plan_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/akuntansi_keuangan_lanjutan_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/borning_room_information.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/rlandal_ergen_lezbiyenler.pdf
    • https://static.usrfiles.com/ugd/b8c837_0318ce9b7a9f4da4803544ac6e87b46f.pdf
    • https://static.usrfiles.com/ugd/b8c837_951804e42c4042118ffa12fd06bb8eed.pdf
    • https://static.usrfiles.com/ugd/b8c837_228a3867b1294af7bf5aa8fe154c1dba.pdf
    • https://static.usrfiles.com/ugd/b8c837_43be3bc142ca4fbea274bbe945c4e436.pdf
    • https://static.usrfiles.com/ugd/b8c837_1203834decad448b98ae5f210da8ec49.pdf
    • https://static.usrfiles.com/ugd/b8c837_f453484c0fce4c15bf2363b5383b5521.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd8ff4ad550544d0aeebc004da01322d.pdf
    • https://static.usrfiles.com/ugd/b8c837_80e6448bd0a644cfa627e18fc30edf1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9efea030c12f4ddcbf79c469a37b49f8.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/digekesavirawufuvoporud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/68818971499.pdf
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/bipirak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/acceleration_velocity_conceptual_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/nolufosaxogexugugoxuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c6.bin
3adb96a9fd79b18b0f201bb1543cf4f3c67fdef69ad5cacd1caf95c3a543e6fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 4964 bytes
font_01_sfnt_off0000938b.bin
06b1bbbb722c8dfdab9f0249d8b9e7d4f07608b3183b05b61415fb0ccb3cb006
pdf-font-stream PDF embedded font (sfnt) at offset 0x938B 10516 bytes
font_02_sfnt_off0000b775.bin
68e2fd4eb3d57750a8ed4138877aafbe95f8e3d5e33936760ee0d33ccf720a38
pdf-font-stream PDF embedded font (sfnt) at offset 0xB775 16556 bytes