Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c1a7b0abf84295…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 21:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fdb92f35b215d9e484b0e07c8c330a7 SHA-1: a83961c916c722ac1cc763e830ef8604fd074c34 SHA-256: 76c1a7b0abf842952013551cf398cd8a9960a993ad15e0119fcaad386bcecc1a
194 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious redirection and a link farm, suggesting it's designed to lead users to potentially harmful content. The embedded URL 'https://ttraff.cc/pify?keyword=alsco+uniform+linen+service+ltd' is flagged as a malicious redirector. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

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=alsco+uniform+linen+service+ltd In PDF document text
    • http://files.thepuginsociety.co.uk/uploads/1/3/1/3/131384025/5049384.pdfIn PDF document text
    • http://files.stfrancis-stambrose.org/uploads/1/3/0/9/130969623/9250928.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/1/0431/6705/6023/files/miritijifulivolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/alcoholic_fermentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/jeninesezelef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/jurnal_asma_pada_anak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/tegexade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/medical_bacteriology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/nopifupumoziledovekuwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1590/files/vopojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/subtract_fractions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/47227273837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/hk-_47_quotes.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 1

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_off00005837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5837 4888 bytes
SHA-256: f39775e056bc5f4246c22ebea7b895b5cfb2653dd58b85df372bca614b8359c3
font_01_sfnt_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 10268 bytes
SHA-256: 616c0d82d38ff4ec5a25d52576c9d905a7478a45ac3bef570528ea4802e91f49
font_02_sfnt_off00008bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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