Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bf75b12fdcd513…

MALICIOUS

PDF

45.5 KB Created: 2020-09-09 14:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13d70f803013f68c8392d2a2c2fe0657 SHA-1: bdaac0a83db2e4308ed191b6f4d0409b94e3ffcf SHA-256: 06bf75b12fdcd5136f9e014f808e7a84156ecd0663da1afb676acca85e211ea7
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 known malicious redirectors or suspicious domains. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a malicious redirector and a link farm. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic.

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/pify?keyword=formule+pour+calculer+le+pourcentage+massique In PDF document text
    • http://tosewaw.eventsforyou.net/uploads/1/3/1/6/131637306/3233535.pdfIn PDF document text
    • http://files.stephaniegstark.com/uploads/1/3/1/8/131856318/2407532.pdfIn PDF document text
    • http://najaziros.shelleyseale.com/uploads/1/3/2/7/132740405/5104136.pdfIn PDF document text
    • http://files.northunitedmethodistchurch.org/uploads/1/3/1/4/131483584/siginasumawuged.pdfIn 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/4e6dd5_684bed2a859148e4a2981aa2ff40a8d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b98abb_a26718fd4ca14a4f877152b4c7bc3805.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77eba6_01747f1fe2b345268afed788c5649373.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a58b01_3b5111f311a1422fa4adeb2b9c7b8c7f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/227d0f_a195936988e349dd8f3dc88edef2a0db.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9a242c_6d1f089355df4b0bac2de146233277ef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/82829042038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6390/1348/files/fejigesikaduzapewuwavoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/kusudujanagelakakimasa.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_off00006eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 5332 bytes
SHA-256: 537ba8225c0bf99fdc78b79363d97f4d08fc536f7d2e8d9ab2718646fa8fcc2f
font_01_sfnt_off000080d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9 11868 bytes
SHA-256: 94de1816cfc8a632ee37d08ae5da49fe6563255cbb0c651f746fb411be45f32e

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