Malicious PDF — malware analysis report

Static analysis result for SHA-256 e408721b9b704ab2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 09:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f59f7b69075b8e9c44a7c80087c44a35 SHA-1: f47fa87a2d6c9ea926cc79d858cc3e57c3c6a70d SHA-256: e408721b9b704ab2031b0bb3e5fc81d06b66e21142bc0c276f3c77d269179c31
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=voice+changer+application'. Additionally, it features a PDF link farm heuristic, indicating an attempt to generate traffic or distribute content through numerous links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the 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.cc/pify?keyword=voice+changer+application In PDF document text
    • http://files.thepottingshedcyprus.com/uploads/1/3/0/7/130776022/8385788.pdfIn PDF document text
    • http://files.mytridentestates.com/uploads/1/3/0/8/130814110/tetafe.pdfIn PDF document text
    • http://files.viewsfromthejumpseat.net/uploads/1/3/0/8/130814189/662602d2.pdfIn PDF document text
    • http://xujuze.pthscap.com/uploads/1/3/1/4/131453060/dumirux.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/1/0430/9755/5093/files/25885203825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/35992209719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/agile_epic_template_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/wowekapavotosinuzojujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/joy_apollo_100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/cause_and_effect_paragraph_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/33823392673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/66339909578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/losoxebalinokunetelunir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/66993968053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/92752692076.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 8

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_off000077c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 4980 bytes
SHA-256: 62fe3e5d9728dfb92c6371992255301a6c87d36249364baef813cc248991ffdd
font_01_sfnt_off000088a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A8 10352 bytes
SHA-256: 4354cd1a8100680239ba75f45296449f14139e2ebcc659ab14ba94994254592e

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