Malicious PDF — malware analysis report

Static analysis result for SHA-256 120e4726883acd5e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 06:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15efbeebcfed8ab06ee43a92a065cb77 SHA-1: 0bff808dd8616ccbe7abce51c2cbbc5939100472 SHA-256: 120e4726883acd5ede94e4a314acc8ee4c1dcb625da68a4f7b9408df7335bde9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links redirects to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bluetooth+not+available+mac
    • http://files.kimstarksministries.com/uploads/1/3/0/7/130776037/xepuramawudafijeralo.pdf
    • http://files.lms-art.co.uk/uploads/1/3/0/7/130738765/worogumokejux.pdf
    • http://files.ceffortwayne.com/uploads/1/3/1/4/131454106/xuxevolerixuj-tujawifurabi-nusakiduv.pdf
    • http://files.columbianacoc.com/uploads/1/3/1/6/131637163/8c35b74b.pdf
    • http://files.ckglobaltravel.com/uploads/1/3/0/7/130776334/rajirife_zuvarepiz_numojuk_nuramukukoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/23817822986.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/50460284311.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/34885403969.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/zofijusezogejafaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/rubojurevuvore.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/35194255076.pdf
    • https://cdn.shopify.com/s/files/1/0437/8116/1111/files/49757663810.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/pojonijogez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/xanunedujibitulejewiku.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/luwizudatakurozazuduga.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/peduvikuginokipetuguxuput.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064fd.bin
f57c311847438c569dedadb3bb7a30256aa0002c03b5cc7f6ce786875a858e46
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 5012 bytes
font_01_sfnt_off000075f3.bin
7219a12dc6f127d4c51929a1408afe93854b88acd69f770f34092994d60591c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 10112 bytes