Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cf18d3371eae77…

MALICIOUS

PDF

43.4 KB Created: 2020-09-22 11:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0302030fc8261cfce5f1b78be753f36 SHA-1: 67f9396e970c500e8c94bf97d4241fe7d71c3a12 SHA-256: d2cf18d3371eae77f44a0400b6040acc396c6676455350a196373756ec67ce9b
184 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as free downloads for an engineering book, but these links redirect to malicious infrastructure. The primary redirector URL is https://ttraff.me/wix?keyword=engineering+by+design+voland+pdf+free+download. This indicates a social engineering tactic to trick users into visiting potentially harmful sites or downloading malware. The ML classifier strongly supports the malicious nature of this PDF.

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=engineering+by+design+voland+pdf+free+download In PDF document text
    • http://files.malvern-electrics.co.uk/uploads/1/3/2/6/132682039/9574694.pdfIn PDF document text
    • http://files.openchristmasgreatyarmouth.org/uploads/1/3/1/4/131453904/wozikix.pdfIn PDF document text
    • http://pazereb.shrewsburycobblershop.com/uploads/1/3/0/9/130969690/5872923.pdfIn PDF document text
    • http://golosek.maltafpd.com/uploads/1/3/1/4/131453150/rediwofodudag-firerizena.pdfIn PDF document text
    • http://files.jimosphoto.com/uploads/1/3/1/4/131406222/2415258.pdfIn PDF document text
    • http://files.annalisalosangeles.com/uploads/1/3/1/4/131414561/narisa-wopudul-lufalofi-noruzoves.pdfIn PDF document text
    • http://rewilul.wstcharity.com/uploads/1/3/1/6/131606295/sureme_xekoz_tufigunonoz.pdfIn PDF document text
    • http://files.thefashionablecrafter.com/uploads/1/3/2/6/132695571/1240797.pdfIn PDF document text
    • http://ragon.westsoundstem.org/uploads/1/3/1/6/131606289/webos_xunatan.pdfIn PDF document text
    • http://kigeta.fiddlestixdevonrex.com/uploads/1/3/1/1/131163599/8699068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/sim_card_cutting_template_micro_to_nano.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_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 5560 bytes
SHA-256: 40139a7cc1c0eaa2e3205e2a2ea2dae4ffbf30b9924e962412d37ccf1d7e5ca2
font_01_sfnt_off00007370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7370 2092 bytes
SHA-256: 6cb10076eca30a126bc8f71014eb6b942d82ab166c7dee9b05b5226c7968b533
font_02_sfnt_off00007c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 10508 bytes
SHA-256: 28564d60da1e0233ce8b5188f157418b66f4a283775329e05141a69f520626c8