Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c5b75d5ca9aad8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-05 16:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d36cdc419090b4dda1e16b9ae2a205a0 SHA-1: c7c91d720e70107332dbae367fc3404a719518a6 SHA-256: 75c5b75d5ca9aad837defc5c79ac8cafafe22d3b549a2ad1af5ddf6031944101
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for a free download, likely leading to a phishing or malware download site. The ML classifier also strongly indicated maliciousness.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=auditoria+de+tecnologias+y+sistemas+de+informacion+mario+piattini+pdf In PDF document text
    • http://files.nyccbtp.com/uploads/1/3/1/6/131637218/peligus.pdfIn PDF document text
    • http://files.digitalxraypros.com/uploads/1/3/0/7/130739578/c6937752684b210.pdfIn PDF document text
    • http://files.scibridge.org/uploads/1/3/1/3/131383483/6556629.pdfIn PDF document text
    • http://files.racechase.org/uploads/1/3/1/3/131381428/a590d342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/49833045434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/veliverexetududoxovogelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/xituwumexulapufunalux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/14379729578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/75701063030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/84053718748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/parasitologia_humana_david_pereira_neves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/17415268082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/93029395134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8520/9506/files/yg_mp3_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/56975857205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2208/2460/files/87670902855.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC3 5448 bytes
SHA-256: ac110cbb8a88c4ea5c130ea8a393128eac1df1110df68ecd6504c7d8b6d9a177
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 10544 bytes
SHA-256: 5dde86afaa83b9ee45a5aaa70eacca03baafdfdfef1d89a33f4d114ff79f6095
font_02_sfnt_off000081d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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