Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f41dab815040cf…

MALICIOUS

PDF

45.2 KB Created: 2020-10-29 01:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d5ca2ba801a538cd1840c4648f6ce318 SHA-1: 2724f08ea1107b1626270668d89f86bf8683a329 SHA-256: 80f41dab815040cff07b818ce51de6e2d0d2f6591c0395324ac7bcd3aa3ae9df
184 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 disposable hosting services and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are also present in the link farm, suggesting a coordinated effort to distribute malicious content or manipulate search results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=the+rule+of+law+tom+bingham+pdf In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/7037811.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/1604412.pdfIn PDF document text
    • https://dewubonate.weebly.com/uploads/1/3/4/4/134466502/610a5ee.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/8791038.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/toxogowagogevi_bejubekunik_fudofodemitowof.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://duxebiforup.weebly.com/uploads/1/3/4/0/134013009/mowalutorud.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/luxewodofefiri_bijosod_megatiden.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/wurixapuger.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fewekotu-gukiguwetoj-mugavod.pdfIn PDF document text
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/suxipob_jubijaxenigori_juduj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f47e35-8220-4d6f-9a61-691042aca595/lenovo_gaming_laptop_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cb8d68-a323-4762-9ed5-36cd7ac7a06f/87705733154.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/vunupejasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ff199a-b66a-4005-9e04-d21f66530ad3/zovetimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1075435-5464-49da-9a3d-4b15890a2cde/salakaluzu.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/zimomeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8588dad7-0daf-4a8a-87c1-fe08b5fd5e07/birawawoxulazaniw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e32ffbc-eeb4-47a1-889d-7510345f5c95/mefutumugovedukatefajug.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_off0000718b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 5456 bytes
SHA-256: b4652c7a3a60351739009e264f5b6411b890206c8c7720c41af344fc92e5a107
font_01_sfnt_off000083f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F6 10452 bytes
SHA-256: ce2885953ae60064a3e9f1e9b5968591abec900f7d86902b2b5795bd62d5b6e1