Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca05b070b27a77c4…

MALICIOUS

PDF

49.4 KB Created: 2020-09-16 22:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3d661ef34637168dbda739507bba035 SHA-1: 8c3b4c07a35a648341d824980ceb7d1bdeaf4262 SHA-256: ca05b070b27a77c4839279ee5bc7739855d640da7d37d07ac4b473c593e870bf
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a malicious redirector link. Another heuristic flags it as a link farm, suggesting a large number of external links. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the identified redirector suggest the primary purpose is to lure the user to malicious or deceptive content, potentially for SEO poisoning or malware distribution.

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.me/wix?keyword=cualitativos+y+cuantitativos In PDF document text
    • http://files.blogg.allegro-as.no/uploads/1/3/0/7/130775856/damenabuwipezivil.pdfIn PDF document text
    • http://files.mightypineacres.com/uploads/1/3/2/6/132696483/2514616.pdfIn PDF document text
    • http://zijefuted.shannonneelynoel.com/uploads/1/3/1/3/131382028/jezewazad.pdfIn PDF document text
    • http://morizolar.anchoredhomedesigns.com/uploads/1/3/2/7/132741024/9840505.pdfIn PDF document text
    • http://files.lashiousbeautysalon.co.uk/uploads/1/3/2/6/132682785/40f1b67.pdfIn PDF document text
    • http://files.createlemonade.ca/uploads/1/3/1/3/131398250/ad9b35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00371041-3adc-481c-977b-6ee3ee7057e1.filesusr.com/ugd/5ea691_968fd668d5604eacb00f1779dc1e87bd.pdf?index=trueIn PDF document text
    • https://7c7a2762-62d1-48d9-8745-fc83d92eff98.filesusr.com/ugd/02af14_ddd4968e01df4c348479f43dca6d9c82.pdf?index=trueIn PDF document text
    • https://f74274c7-dc12-44aa-b5bb-6a9b317e146c.filesusr.com/ugd/cb4a18_997b6c0a652f453b97f5f92b566603b9.pdf?index=trueIn PDF document text
    • https://07b6a7ba-dd83-471d-8ad5-847cd1a0d496.filesusr.com/ugd/3d7af5_fa90e6272e5e464dbf1ee10d74ff2aa8.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/5150369032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/balancing_scales_worksheet_ks2.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
🗂 Part of campaign: allegro-as.no 3 samples

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8141 4764 bytes
SHA-256: acfddbbd329dfa69fc2b19c51ebb9952daeb2d4a06ede6d7f7b556cb582598b6
font_01_sfnt_off00009193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9193 11704 bytes
SHA-256: f26a51fa4fb1f8d2db44d2039f9af2d420124fb4b86bd36859775ebed4dacace

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