Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfec1626c436f4fc…

MALICIOUS

PDF

72.1 KB Created: 2020-10-17 09:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a2db3ff721817e57e3960d964c1f62b SHA-1: f1e61292c598fec155d4e6456b5bf874053ab3cc SHA-256: bfec1626c436f4fc04885dfa59061c6842156bded2bba6c27e9f5c9d0a931a14
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 redirector infrastructure and link farms, indicating a phishing or SEO poisoning campaign. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.link/123?keyword=poultry+house+design+for+broiler+pdf' is a primary indicator of malicious redirection.

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/123?keyword=poultry+house+design+for+broiler+pdf In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/xoruma.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/3532263.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/1820268.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/8697108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f87372d91dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8919bdd99e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/all_the_pretty_horses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1262/8895/files/kitchenaid_superba_washer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/alcaloides_del_cornezuelo_de_centeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1594/5371/files/89367883826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298c5a65-440d-4ad9-88bb-a921fb63c691/bakesopumivufuxegosifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e4a278-0d26-472c-8363-3010fb647862/mutanogef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0f3da2-b9dd-40ee-9136-ce210e2744b5/60725297006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9238/8261/files/vogue_us_media_kit_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/jurnal_metode_penelitian_studi_kasus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/96302019069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7557/1364/files/70472510331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1955/3944/files/pimurajagijiwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8958/2998/files/average_bond_enthalpies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5229/4055/files/slate_roofing_st_louis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 5216 bytes
SHA-256: 56ca37522b90b8c5acfeca93f6d06259af69e9e943269a5a5ff087456aad6772
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10352 bytes
SHA-256: 6c6ca877ca7fd115bf09e766ec61fd5fc7d555bceba3369156dc30e2a9fa3cbd
font_02_sfnt_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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