Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ece6d36edb9409…

MALICIOUS

PDF

127.2 KB Created: 2020-08-08 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 192f483f0a1f2d0df8781d6064afad0b SHA-1: 31873c7d74b075459f4e619dfd28cc101a49e766 SHA-256: 78ece6d36edb940906452601521d14022cd5d39892ea3fb16159f6c77feca040
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL 'https://ttraff.com/pify?keyword=american+english+file+1+pdf+second+edition' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, reinforcing its role in the attack. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=american+english+file+1+pdf+second+edition In PDF document text
    • http://files.liftbaltimore.org/uploads/1/3/1/4/131453121/1379631.pdfIn PDF document text
    • http://ramovo.gulfcoastdi.com/uploads/1/3/1/8/131856462/gotunofifigo_sigav_wonakiz_zowemadufu.pdfIn PDF document text
    • http://nulisumus.zportman.com/uploads/1/3/2/6/132695384/fosubozuvik_nelawot_misojotenixo_gigefoti.pdfIn PDF document text
    • http://leziset.doctorshousesozopol.com/uploads/1/3/2/6/132680813/8686159.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/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/brasart_160_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/26527018948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/empirical_and_molecular_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/graphic_design_books_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/65444166054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/pineze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/sherlock_holmes_deductive_reasoning.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A98F 5612 bytes
SHA-256: 7835eb99b4e69ebe20a9d7634ded9db076e6dcb81079af3d14542ab1d1b8b9a4
font_01_sfnt_off0001bc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC7D 15996 bytes
SHA-256: 5a844b34f7b864839069abfd7b3d771681fa909b3cf030044bd1ee6ce95d2744

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