Malicious PDF — malware analysis report

Static analysis result for SHA-256 d107add4bec4756b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 00:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a96b042cfdde4bd1ba8bf0939f057d9 SHA-1: 08a86724d2dd3f9b71a31fa8d70a6bf9cb3602b7 SHA-256: d107add4bec4756b741ff682e47d90f64f10b6f14c8424d1da932e7a9471944a
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, disguised as a user manual for a Whirlpool washing machine. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, likely to improve search engine ranking and distribute malicious content. The primary malicious IOC is the redirector URL.

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=whirlpool%20washing%20machine%20650d%20user%20manual
    • http://files.pinehurstmanorhoa.com/uploads/1/3/1/4/131406935/9390a51ba5.pdf
    • http://lujod.commercialbondstexas.com/uploads/1/3/2/7/132740405/katonikubufifus.pdf
    • http://zufuwu.maydwellarts.com/uploads/1/3/0/9/130969679/7353709.pdf
    • http://files.evandusenportfolio.com/uploads/1/3/1/4/131454355/bf82dedefb0f4.pdf
    • http://files.penelopijones.com/uploads/1/3/0/8/130813320/6f0ea31cf87af1.pdf
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/sample_essay_for_ielts_writing_task_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/labupulozosoveguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/english_to_arabic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/38312027057.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/anti_corruption_commission_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/asignatura_estatal_primero_de_secundaria_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/ganovaruzivoxite.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/29294731186.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/9714456865.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/2090627121.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/pawalesafuworesevasabi.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_off00004c28.bin
94103c4f88d2a11b092330bfb838d136251b3ec208bfa5f69558d352e500797b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C28 6012 bytes
font_01_sfnt_off00006080.bin
040c9eed6799c187925e9f8e041745fece798d3b6c4d3ffc1db3ce7253feea5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 13696 bytes
font_02_sfnt_off00008c23.bin
0d7a92828fb34c46272def7401d297891c72c028a4bdfa4d2814ce18bde6b281
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C23 16164 bytes