Malicious PDF — malware analysis report

Static analysis result for SHA-256 864274c9eb469069…

MALICIOUS

PDF

42.4 KB Created: 2020-09-11 19:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d39809f85483165da2fb196dfc4a3d8a SHA-1: 2d151f6e4709c0566b1e2502b64af95cdd78ad0a SHA-256: 864274c9eb4690696e0d9342c4359a47c4fffc52409b6b1389080bdc6d3159e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The ML classifier and heuristics indicate malicious intent, likely to direct users to harmful content or phishing sites. The presence of a malicious redirector URL is the primary indicator of this attack pattern.

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.link/wix?keyword=aerosol+system+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/54bec1_2e6e0c043e3248ddaf4e94587332a4af.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10e3af_f86447da8bfb486eacb4d4703e119102.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02af14_470a0f36d7264ab5b90a9348f46a3b46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c250_ecd13a310e5c4a5c84f81223b3242ee7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/baredewasizuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/xowamib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/pegaxovuzus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/astm_d445_06.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/kolekikegokeziseratol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/coding_interview_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/company_profile_ppt.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5068 bytes
SHA-256: c1ea444016e92cf9a35dbc22fd6db56e4a0b4717b489349bf0509d992262a849
font_01_sfnt_off00007a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 10388 bytes
SHA-256: a3c3654361aca966b3a63d7cc5d386173009d060448b32606685f6dbdebd1610

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