Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfde86073752216…

MALICIOUS

PDF

39.9 KB Created: 2020-08-04 17:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a5fa62adfab883d67bf4e4611f72ec6 SHA-1: 243ae1bc4aaac7419c76342ed46b47c4e65ba8e4 SHA-256: dbfde8607375221614a50f897967e923982d1c25aa4badc13020739834b889e4
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious content, disguised as a solutions manual. The primary malicious URL identified is https://ttraff.cc/pify?keyword=a+concise+introduction+to+pure+mathematics+solutions+manual+pdf, which likely serves as a redirector to further malicious sites. The document body itself contains obfuscated text and embedded URLs, reinforcing the malicious intent.

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=a+concise+introduction+to+pure+mathematics+solutions+manual+pdf In PDF document text
    • http://files.krabidream.com/uploads/1/3/2/6/132681566/3285554.pdfIn PDF document text
    • http://files.whisperofspirit.com/uploads/1/3/1/4/131453555/wovaluwelidovit-fopajelomal.pdfIn PDF document text
    • http://files.brettwolff.com/uploads/1/3/1/3/131379113/1102422.pdfIn PDF document text
    • http://files.missionschurchorlando.com/uploads/1/3/0/9/130969313/6d545c1b873.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/1/0430/4211/1641/files/64277495193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/wezaxezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/rigoliwexelifavakopijotiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/fofusirexixojadutevilunir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/sadobogex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/73186771688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/55371821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/63911481556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/54013887178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/physiology_of_transplanted_heart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/astrology_a_guide_to_understanding_your_birth_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/4184785408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/67059161.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C15 5384 bytes
SHA-256: 0d5a77b80fd7123a8a1599253f127593594b201a9636b8feb654ffbab58dfecc
font_01_sfnt_off00006e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 10564 bytes
SHA-256: 29d7896612cdff8ca7de9afbe8bb436966fc62d7e1fc42c0f4f89cf2ad54bf93

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