Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9123400f9dfdee6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 01:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34ebd94f6fa98b386facf7aa8c50e29f SHA-1: 77c4a3bdcb56ccab821bfc3fb63db87cd915d003 SHA-256: f9123400f9dfdee6e4f54b3257189f31e53ed613ec62a7c7871e774c1ae6eca9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one prominently leading to a malicious redirector at 'https://ttraff.com/pify?keyword=writing+task+1+bar+graph+pdf'. This URL is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

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=writing+task+1+bar+graph+pdf In PDF document text
    • http://files.annwjarvie.com/uploads/1/3/2/6/132681812/kefiwopapatatog.pdfIn PDF document text
    • http://files.poconoavianresearch.org/uploads/1/3/1/4/131409717/lulalulakokoz_fujenezabujupu.pdfIn PDF document text
    • http://nopuzikiw.jacquelinereich.com/uploads/1/3/0/8/130874655/dda4f212a3.pdfIn PDF document text
    • http://files.jdaei.com/uploads/1/3/1/6/131636625/9596933.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/1/0432/8236/6629/files/61690254324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/65390973261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/gba_bios_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/18310145438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/karoxarezarimomepokozud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/psc_bulletin_diamond_jubilee_edition_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/npm_commands_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/39137082980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/revaxitomosovadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/brideshead_revisited.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_off00006c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C30 5540 bytes
SHA-256: 141d58589a6ac030ce31f27f3fa1ffe39506705339a00390ea551e13ad661e95
font_01_sfnt_off00007f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 12204 bytes
SHA-256: a9d2fe2df341766df842512d47667447b0772d435731d373a2b12f6ae2c56a24

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