Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e7e3c7fcad42c4…

MALICIOUS

PDF

50.7 KB Created: 2020-08-05 05:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7663bc81a4f6aff790b01f606885307b SHA-1: 55563857b877a5d8fee3f4db268ccb8914c6698e SHA-256: d8e7e3c7fcad42c400a9de98e06f05b8c909a08df10bcd3b1326999f85e6cb40
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a primary malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=concise+paediatrics+pdf+free+download'. This suggests the document is designed to lure users into clicking the link, likely to download further malicious content or be redirected to a phishing site. The document body and embedded links reinforce this lure by mentioning "Concise paediatrics pdf free download".

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=concise+paediatrics+pdf+free+download In PDF document text
    • http://files.ossipeecentralschool.org/uploads/1/3/1/3/131384249/966349.pdfIn PDF document text
    • http://files.xzibitstudios.com/uploads/1/3/1/3/131379980/2056237.pdfIn PDF document text
    • http://files.allisonattitude.com/uploads/1/3/1/8/131872087/dudobikuluru.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/1/0436/0978/4482/files/77709704025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/11475955396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/26232553509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/administrao_de_produo_e_operaes_henrique_l._corra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5438/1721/files/zadakopimowubijusotova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/search_text_layer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/dajelagexawaweri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/veruvolejuxosulazukuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/decimal_number_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/27225807207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/dexivaniwapuginewoxixu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
stream_005_off00008b7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8B7B 26976 bytes
SHA-256: 129686b3aee7178490784ad70bb84c370aad838ecb3dc1cc896a7fdefc0fa646
font_00_sfnt_off00005970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5148 bytes
SHA-256: 16030f14f766ea3946790cbec5efb8ebf8485e2c2820a79ad563aa35ee169e08
font_01_sfnt_off00006b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B11 9440 bytes
SHA-256: a80935eab46a666d53691351d6c366f4537a36e9dade9342e3a3b8a5b7ff4e45

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