Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ffce3aa13b0a97…

MALICIOUS

PDF

42.9 KB Created: 2020-10-25 18:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7dc400b7e7a4b20a76472a7f81b2f3a2 SHA-1: d36c55fc1327d9ccfd4163fc9d8c8d757991916f SHA-256: 68ffce3aa13b0a97feb23819d4243a5d56bcdbc5df1e7896a3d50fdfa40b4354
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that suggest a link farm or SEO spamming tactic, likely intended to direct users to malicious content. The presence of numerous external links, many pointing to PDF files on external hosting, further supports this. The primary malicious IOC is the redirector URL.

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://ggtraff.ru/strik?keyword=elements+of+econometrics+kmenta In PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/1918381.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/miwijunuruxodot.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/vivarolexogi_xilibak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8c8d7ada2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8d052cc01b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f923c11075e5.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://uploads.strikinglycdn.com/files/421f937c-c0da-44c6-be6c-85a612b78d62/durutif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d06236-aec7-422d-9378-9ed4a31925fe/black_bible_anime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21e7378-6370-44d7-a399-c9eb0f1d3e19/97376987619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becc5ec7-d0dd-425d-a484-a76366ceaceb/68441326714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd7db1a-d71a-4985-8c91-08be447b3d46/8680614743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b04c8c-6313-4ceb-8417-732aba50d9ff/35248478364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9718ee-f7a0-4658-a1e8-a899f1ceac09/94454119231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce971859-9285-4ae4-83fb-87621dc39407/6244182829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9234d267-6008-4cf6-9f04-c788d4e83ae1/red_giant_complete_suite_download_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7dfdbca-770e-4921-8fb3-60baf1af0e9e/zajuzapobujiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219f8334-fe1e-4e95-93df-cab7953dc829/tire_sales_florence_ky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e25269-ffe3-4d6a-90f9-096e5b7dc8a2/18685946796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741f00e1-247a-4487-a473-c6fdb502c54f/40584061521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3a5f71-97ec-47c3-b7e4-22b95fc0ffed/wabemebotavipex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288242a0-fe91-4b18-b461-b4eca22cab32/6434328496.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_off00005bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB9 4836 bytes
SHA-256: d419b16f39580ff9262e941826e2244099d1484b4e2fe1be13a2b50654bf327e
font_01_sfnt_off00006c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C06 10556 bytes
SHA-256: 5a52c5f81fb1fac878b7b5fcec8fe0a61e908c618632668211cbc683026c365c
font_02_sfnt_off00009046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3