Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfabc66953cc28e…

MALICIOUS

PDF

50.3 KB Created: 2020-08-19 21:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62c5c61ee9568036a7ec5d458a0a754f SHA-1: 2fd4df92ed2fbe15f4ea67415a58a4e1832a7222 SHA-256: 4bfabc66953cc28ea5012c5a1fb129ecfe8ca4115a74356dc4aac26de1742fb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains a social engineering lure, instructing the user to install a 'Chrome offline setup'. It utilizes a link farm with numerous PDF links, including one pointing to a known malicious redirector at `ttraff.com`. This redirector is likely used to deliver a second-stage payload. The document body also contains the malicious URL, further reinforcing the lure.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=chrome++offline+setup
    • http://files.mayhemturbo.com/uploads/1/3/1/8/131872087/mizegugesexa.pdf
    • http://files.megasaverstores.com/uploads/1/3/2/8/132814958/sixebiloxik.pdf
    • http://files.belmonthighlibrary.org/uploads/1/3/1/4/131483488/namukiwirojuwuv.pdf
    • http://files.anntowell.com/uploads/1/3/0/8/130874474/7527669.pdf
    • http://files.benjamin-lhotellier.com/uploads/1/3/1/6/131606000/pexunure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/disus.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/causas_de_caida_de_cabello_en_mujeres_jovenes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3164/8661/files/holding_company_structure_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/angulos_entre_rectas_paralelas_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/northwest_territory_tent_website.pdf
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/39693993311.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/vamonumesoruxofido.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/82071841608.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/43594228754.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/wajesumenudetidudirexewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/34970609941.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_off00007b1f.bin
9338742f49f416abf4841f39b56fed70e41be6e058cf09e189299c35990f9250
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1F 4836 bytes
font_01_sfnt_off00008b6a.bin
826b8f483c4540894ddaedb093cba762cbc59734215342358003b91cfad4425b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 10120 bytes
font_02_sfnt_off0000adee.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xADEE 4324 bytes