Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd439563f6d154d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 01:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7fa6b45bd002aa67424607684aafffa SHA-1: f4968380c5785f9c97bfb574cc21e8f20183768d SHA-256: 3fd439563f6d154d57702bfb600278a93027b590fcaf1d7e989eb018daa30b77
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=video+er+mac+free+full+version'. This URL is part of a link farm designed to attract search engine traffic. The document body, though heavily obfuscated, also contains this URL and references to 'video er mac free full version', suggesting a lure for free software. The ML classifier strongly supports the malicious nature of this PDF.

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=video+er+mac+free+full+version In PDF document text
    • http://files.adhlenglishlabradors.com/uploads/1/3/1/8/131871902/tonetoxanav_venaxemupux_badekizirexo_nizoruvol.pdfIn PDF document text
    • http://files.mortonshetlands.co.uk/uploads/1/3/1/4/131438274/d37075075.pdfIn PDF document text
    • http://masamizug.huongseng.com/uploads/1/3/1/0/131071114/tiwejoxin_jegapawifo.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/1/0433/1474/1413/files/febinobezibakipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/addis_ababa_university_accounting_research_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/vibolozoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/belotujojipepufutazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/the_haunting_of_hill_house_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/61117052088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/790708410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/wimurewaboziviberarewet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/37412457929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/albany_state_university_application.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_off00006891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 3288 bytes
SHA-256: 6ab46f12474e68139f673941b37e9ef79510a81aedee0b72b2ed9b9adda6591a
font_01_sfnt_off00007454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 5192 bytes
SHA-256: e7b60d60e9b36fc08d90a5a54e0b60ae316e2995880723f3a192a0754167dbf8
font_02_sfnt_off000085ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EC 9968 bytes
SHA-256: d0ab9132fb891d8aa022dffa5b3936d2adce1701021e26bd703281b701e0f65b

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