Malicious PDF — malware analysis report

Static analysis result for SHA-256 836ad20976ebad59…

MALICIOUS

PDF

43.5 KB Created: 2020-08-25 03:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dccaa472a748731c522f4251be97aa6 SHA-1: c70435ed5b763c39d003b8c986db329a0cf707e6 SHA-256: 836ad20976ebad5915cf60157611bca6097f2802e635f3ab9ae6715ecebde4c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body and heuristics suggest a lure for free downloads, leading to a malicious site via the ttraff.com redirector. The ML classifier strongly supports the malicious verdict.

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=block+calls+without+caller+id+android In PDF document text
    • http://wipemila.capefearorchid.org/uploads/1/3/1/6/131606349/5d0a7428.pdfIn PDF document text
    • http://dakebage.pachamamanativeart.com/uploads/1/3/2/6/132681352/7be39672d.pdfIn PDF document text
    • http://dezima.vipwoodenpens.com/uploads/1/3/1/0/131069839/3921818.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/1/0430/9821/0461/files/16365436915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4861/9419/files/margaret_atwood_the_testaments_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/samsung_bholanath_video_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5065/5129/files/92632101640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/super_mario_bros_3_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/53313564391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/masegoduxivav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/57613926613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/39347080641.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 2

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_off00006a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A78 5232 bytes
SHA-256: fee6be3946f945f44d4259b0fda8dc21285abec46686303f7ce3d33446434356
font_01_sfnt_off00007c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C45 10792 bytes
SHA-256: 92252dede4c83c429b1dd53b1fd980866714e6fad39111171262732f20c05ac5

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