Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc16153b8645ccf…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 05:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2328458490a30fbeb30138bb8066d7ac SHA-1: 4db20f0159dba1901c991e401f42566a2c8c9dc9 SHA-256: dbc16153b8645ccf3a20d6d5c0c143381400f9551d70429b95452dc97c5fa986
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=oxford+english+tamil+dictionary+free++pdf, which likely leads to a phishing or malware distribution site. Another heuristic indicates a link farm, suggesting an attempt to artificially boost SEO for malicious content. The presence of a 'Download' lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=oxford+english+tamil+dictionary+free++pdf In PDF document text
    • http://files.triadmanagementrealty.com/uploads/1/3/2/6/132682790/somejuwamajotidemox.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/1/0430/6924/3549/files/duxegusisasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/zanesawosasusujurum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/31874305842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9256/6435/files/7_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/nakof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/behavioural_approach_to_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/1379384110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/70694954919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/48217297400.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 3

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_off00005746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5746 5764 bytes
SHA-256: b5c543044344b11617f68ca506fc4314448aab45a48d5f2ddc158523678f471a
font_01_sfnt_off00006aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 14408 bytes
SHA-256: 792061ad8e685eb0f268b0721b122489dab74073575fb7ecbe99cb4ebd30bce1

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