Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeedfb4f389307e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 21:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2e1054db82def8d27bd2aa3f22319c6 SHA-1: 7666e47d2033f321c3f871229b88a6939005229e SHA-256: bdeedfb4f389307ef35e054919e180635c98f80cdcdcd09463137d56d8495f05
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 18 external links, many pointing to Shopify domains, and a primary malicious redirector URL. The document body, though corrupted, contains text related to a 'whirlpool front load washer and dryer manual' and the malicious URL, suggesting a lure to disguise the malicious intent. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the presence of malicious redirection and a link farm, respectively. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=whirlpool+front+load+washer+and+dryer+manual
    • http://files.originalartworkdamienvenditti.com/uploads/1/3/1/3/131378993/wonokaro.pdf
    • http://files.dakotarosefloral.org/uploads/1/3/1/4/131454766/4540973.pdf
    • http://zujolopu.hawgridin.com/uploads/1/3/1/0/131070356/9e5411be79e930.pdf
    • http://files.listprogramme.com/uploads/1/3/1/3/131382148/nujuv_junaxapumep_nubajazilola_fefarusarut.pdf
    • http://xisitox.hdihidupsehatkaya.com/uploads/1/3/0/8/130813669/zamex_xupeluvelonera_tekajuroko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/boromaxagawujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/69102741230.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/dubavamesijerumavogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/10953498244.pdf
    • https://cdn.shopify.com/s/files/1/0439/1187/2667/files/25499346502.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/99326588638.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/mareledexinewudebuzadaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/17009218450.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/33307996350.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/gobafovetuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7642/files/bookkeeping_transactions_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/97207110071.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/rovaxekadalup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067cb.bin
859359db1f0bc0d4a0a11e3a12ab5af1346bcb9762b4d33f7d3b79f3fc11d514
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 5488 bytes
font_01_sfnt_off00007a5d.bin
9d2843ee4ae59160138e154704017b6158d77f0b9a9c9fd668f47b4026312121
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 10340 bytes