Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2e76edbd251a0a…

MALICIOUS

PDF

41.0 KB Created: 2020-10-16 12:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 055dbf599dab21f1f5893d3d23130b25 SHA-1: 9bf98fbf9f88b2bda594a15d486b1244a10ac007 SHA-256: 6e2e76edbd251a0a33c03dc41de0e508aa8ac65315b58e2027a30ded7fb030d6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially malicious content, possibly as a lure for further compromise.

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://gettraff.ru/123?keyword=combining+like+terms+guided+notes In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/kuriwidupesejaro.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/bamunekavif-zozisikalafo-lugawo-wurifupit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f88dae359310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f882eb880d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f88b51a3a519.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/4a90eaba6.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1d32287.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/11eccb2.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/0c30c6eb-e37e-4baa-bb6a-737b0bd109b3/42587378327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5880f38e-b36c-43bf-ae5e-889622d43c26/mabexuxifuxomiluxafuzidel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa8dd17-272c-40cc-ad5b-efc7714f8ad4/69527967705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4535/6198/files/gebivomufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9339/8182/files/download_facebook_lite_new_version_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4400/6819/files/solving_surface_area_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6386/7552/files/the_abaco_club_golf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/xapapid.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_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5044 bytes
SHA-256: 4c3e1b47160ed3f8e97f530589f3359b44eb6a57773e6f48d8bd715b477f8b9e
font_01_sfnt_off0000732a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 10424 bytes
SHA-256: e8f1f13889cebccbdb64c86198edf5c0bc6ffd6418a2eaebc837d45d484ef39a

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