Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0ba45e38a5dfb2…

MALICIOUS

PDF

32.6 KB Created: 2020-10-26 14:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b44bbc9d26b62de1675051d68a447482 SHA-1: 27b2f576b17e6c827110b01f9e5147df715aac18 SHA-256: 8c0ba45e38a5dfb26cdd253294a6116b92a01a560dadf99033508278571b1bb5
144 Risk Score

Malware Insights

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

The PDF file is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking a link. The embedded link `https://ttraff.me/123?keyword=asus+eee+pc+1001px+manual` is flagged as a malicious redirector, indicating a phishing or malware distribution attempt. The presence of numerous other links, many hosted on disposable domains, further supports the malicious intent.

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 32 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.me/123?keyword=asus+eee+pc+1001px+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f9539f4bec36.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/6c449bab7a.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/1848004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purawuma/rh_blood_group_system.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/quick_cable_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/documentary_storytelling.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/sukaxaxuwaxaduketobunupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc7ec36-9504-46ed-bb66-cef3c91407cb/wifaworugixelewobelabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77f96e1-8b56-48fa-9b05-1aa2b85c657d/dunubatitilazir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/36649049958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/medukujitosatuvipoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3136/6298/files/ninosopefemudoxegak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8092/8420/files/spanish_tv_guide_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8773/9035/files/appartement_te_huur_turnhout_3_slaapkamers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108f2989-28d2-4686-b96b-9e6e810a1375/21859904490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c365ad5b-c841-4552-ad40-b8235b18fb36/carey_organic_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e93a34-8720-4c16-96e5-006e6bbdb7e1/podokubujemamiboduwa.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_off0000490f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490F 5232 bytes
SHA-256: 9a93d530bda92b2de9f0c2f47979f782d4a3434511a8b888183ce00060b91eeb
font_01_sfnt_off00005ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACE 7868 bytes
SHA-256: 6d7e71eb492dc7f48786f8024860eba6bab49052faccba2d7df8ca726d08f491