Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a05bbbb160d00d…

MALICIOUS

PDF

33.6 KB Created: 2020-08-04 04:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f62de2a87ef5593aa99317b35d3fd5ba SHA-1: 610560d309aa6e267e132bd7ee0ba54345e74cd8 SHA-256: 75a05bbbb160d00d648b12c3166119734f4456e3fc7078f2854dd3eb36896317
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector URL (https://ttraff.ru/pify?keyword=imperative+verbs+worksheet+pdf). This suggests a link farm or phishing attempt designed to lure users to malicious infrastructure. 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.ru/pify?keyword=imperative+verbs+worksheet+pdf In PDF document text
    • http://files.lightandshinedesigns.com/uploads/1/3/0/8/130874038/4750522.pdfIn PDF document text
    • http://files.andyjohnsonpsychlab.com/uploads/1/3/1/8/131871494/8961320.pdfIn PDF document text
    • http://files.merlotembargo.com/uploads/1/3/1/8/131872015/2592258.pdfIn PDF document text
    • http://files.nadermakki.com/uploads/1/3/1/4/131452824/6c089afb5.pdfIn PDF document text
    • http://files.janpeterdegraaff.com/uploads/1/3/2/6/132683017/rozekerise_mudafabunonu.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/1/0431/7347/8560/files/dofetafuwipato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/84666431334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/56438862077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/16331014185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1477/4169/files/19271119716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/12051390081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zemivok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/15165396991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/94209017638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/mavutekufobuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/paparoxokurifeginenu.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 7

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_off00004800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4800 5544 bytes
SHA-256: af03db5094293bbb165ed87a239646137a5dd5c38207c6822cf4f0face9a453c
font_01_sfnt_off00005abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABB 9068 bytes
SHA-256: 71fb2bd142a7acddacae81a788dee85c2b521cc89f5f8a1eaa04e49a280aec70

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