Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36645f492bf9815…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 22:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3699e8e19d725a795a7e8c7efec9c9ab SHA-1: 941a5bc653d1b4c671c61cf26d3c03527330d5fa SHA-256: d36645f492bf9815e16a9f1b10e4677631ea2e7a3e887d93729b48f4a42150dc
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a suspicious one pointing to 'ttraff.com', which is known for malicious redirector activity. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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=nabucco+libretto+deutsch+pdf In PDF document text
    • http://texelaxej.fetzerscake.com/uploads/1/3/0/7/130775085/fikap_wadedasuro_vuvetalezamokuj_lutujoguvofapuv.pdfIn PDF document text
    • http://files.bridgesofhopetx.org/uploads/1/3/0/7/130738988/4093454.pdfIn PDF document text
    • http://files.threerivershomeinspection.com/uploads/1/3/0/8/130813888/tisurosaga_diremorekufedoz_datapubi_pogijajin.pdfIn PDF document text
    • http://files.torontobelts.com/uploads/1/3/1/0/131070792/givujifejev.pdfIn PDF document text
    • http://files.longbeachcarpetclean.com/uploads/1/3/1/3/131398362/kirifaladupilet.pdfIn PDF document text
    • http://www.opera-guide.chIn PDF document text
    • http://www.opernfuehrer.infoIn PDF document text
    • http://www.opera-guide.infoIn PDF document text
    • http://www.opera-In 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/1/0433/0107/7142/files/37999927178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/air_i_breathe_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/flush_door_design_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/lajumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/gemuwobofowewifakudedaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/advertisement_copy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/alagappan_clinical_medicine_5th_edition_free_download.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 4

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_off00006cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDC 5352 bytes
SHA-256: 342bba689ce227cfae34e3b05c67e547cdec78a800f18f59edc233a8e88fc3f6
font_01_sfnt_off00007efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 10708 bytes
SHA-256: a776b18f51d3421f2f62dd278436e88b40b65383e12f1a4e0462af9175368e35

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