Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5ed18dd2a26fb…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 20:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bba68f4c6ee4f47ea0ce8c2d5eb50029 SHA-1: dda36b5c4426dc74227b9235dcb6036101df070e SHA-256: 5de5ed18dd2a26fb0e7bfc9d5e937d74941d0d9f6dff8f834f38ed70b0251e7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. This suggests a phishing or scam attempt, likely using the 'free download' lure as indicated by the SEO link farm heuristic. No scripts were extracted, but the presence of malicious redirectors and a high ML classifier score strongly indicate 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.com/pify?keyword=anaphylaxis+pediatric+guidelines+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2 In PDF document text
    • http://tezex.thornhillactingstudio.com/uploads/1/3/0/8/130873995/fawurejajovanusotite.pdfIn PDF document text
    • http://files.crichardking.com/uploads/1/3/1/4/131452858/rizositese_refuxoxurox_tamefadire_bixulekafu.pdfIn PDF document text
    • http://numuxub.chriscosmostattoocyprus.com/uploads/1/3/1/4/131437069/pesare.pdfIn PDF document text
    • http://files.tassaace01.com/uploads/1/3/2/7/132740930/vamiwibogi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4583/1324/files/watojalumido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/cbse_class_12_syllabus_2020_18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/hunger_games_3_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/57659761227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/pajivovasepotaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2381/0211/files/mamiwuferukuxikavibidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/animal_cell_parts_and_their_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/zijokovevidir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/dekaxekewizemusazok.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 3

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_off000059d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 5492 bytes
SHA-256: f740e799db044775b913a58c0814276e4ec4d5d907e786daa018c63362d949ed
font_01_sfnt_off00006c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C71 6228 bytes
SHA-256: 719a7819176e2d2fcba9dcc7371bc7de13d32aea0dd65be061c78de1271d2243
font_02_sfnt_off00007ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA1 10788 bytes
SHA-256: 89df438d54863a4a0889e49421312c12b4b0bacb667721a710c1bcca22eea1de

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