Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4598906e6bf7732…

MALICIOUS

PDF

41.4 KB Created: 2020-08-15 16:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 427d7dc39847d7fe735836ee64bd4e5e SHA-1: 2d862a92db5900a2599ec068b79f9f695f790721 SHA-256: b4598906e6bf77328985ddff1d40e2e073d62d382560573cb85227e62d85c50a
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. One such link, https://ttraff.cc/pify?keyword=low+density+foam+sheets, is identified as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. No scripts were extracted, limiting the analysis of further stages.

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=low+density+foam+sheets In PDF document text
    • http://gusuli.katherineorchard.com/uploads/1/3/1/3/131383483/9c276d599602.pdfIn PDF document text
    • http://files.presentationcentre.ie/uploads/1/3/2/8/132814680/15ad9.pdfIn PDF document text
    • http://files.thewarblog.com/uploads/1/3/1/4/131452958/2285268.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/1/0434/1121/0398/files/87906048562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/88464154063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/android_camera_image_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bare_necessities_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/acute_pancreatitis_scoring_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/sociological_perspective_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/xifevototedekamagogoduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/tantra_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/zanadixinoxilupalutul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/40922338927.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_off0000639d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5156 bytes
SHA-256: 0d104d58c28558d36b521c92576ec56c41477c8128d223909947cb25b656372c
font_01_sfnt_off00007520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7520 10524 bytes
SHA-256: 8816a59238e4f6cd4d9e72296fb6b2b0f805c20a1f1158e2d3395a6cd37ff636

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