Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf5fe3f68b860cc…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 22:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aba97a385db0f757c5f21de9be4dc51 SHA-1: 4f8ac225af609e23ea71975183ad09ab49b5c51e SHA-256: 8bf5fe3f68b860cc973fadc9930f220c2ecfa37bf75f71e902236c60c12bbc29
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=gy-+61+datasheet+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify domains but lead to PDF files. The document body itself is heavily obfuscated but contains the malicious URL, reinforcing the redirection attempt.

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.ru/pify?keyword=gy-+61+datasheet+pdf
    • http://files.jihyunhong.com/uploads/1/3/1/4/131438639/221bbf09e36.pdf
    • http://jezekonej.desmoinesmarina.com/uploads/1/3/0/8/130874493/7836351.pdf
    • http://nuvidez.lglministry.org/uploads/1/3/1/3/131380480/jonojudupoxez.pdf
    • http://files.mobileweldingservice.co/uploads/1/3/0/7/130740522/c53351a.pdf
    • http://files.bwcuhrichsville.org/uploads/1/3/0/7/130776204/c656d2.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/famous_english_short_story_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/functional_training_routine.pdf
    • https://cdn.shopify.com/s/files/1/0440/7348/4438/files/bodyboss_method_free.pdf
    • https://cdn.shopify.com/s/files/1/0452/5654/0317/files/tasmanian_tiger_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6981/6478/files/wunimezopovefetisepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/xozorunanaruju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/fire_emblem_path_of_radiance_ebay.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/callback_function_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/dewuwosagutikogudujakilaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/xudujekud.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/tujisikukusoj.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_off00005f83.bin
e3d11d863c97b8156318fc1232093281e2149a8b3bbe3364a37b77862845a95c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 4896 bytes
font_01_sfnt_off0000704c.bin
3dab3b317ce80929c3c9bdb4aee31d27a115ce385a7da45012f8afb0d938f003
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 9980 bytes
font_02_sfnt_off00009286.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9286 4324 bytes