Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c58c1abe564382…

MALICIOUS

PDF

68.6 KB Created: 2020-08-24 18:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b40491a23558d1f1445a7f76f28fa0c3 SHA-1: 117e8320ae497b241fc2a8b018627750d6b97f21 SHA-256: 99c58c1abe5643822aa81793eb7c1b299df63f3cf552137cf88c3e2dae9f88c5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL 'https://ttraff.com/pify?keyword=parent+functions+and+transformations+calculator', suggesting a lure to a phishing or malware distribution site. The presence of a PDF link farm further supports 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.com/pify?keyword=parent+functions+and+transformations+calculator In PDF document text
    • http://files.castleislandcamps.com/uploads/1/3/0/8/130814784/230282.pdfIn PDF document text
    • http://files.slgsponsorship.com/uploads/1/3/0/8/130814192/8a1a4ec04da4e.pdfIn PDF document text
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
    • http://files.jericosoundsystems.com/uploads/1/3/0/7/130739405/dinejuwigakuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/21172727055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/mm_dd_yyyy_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/reduce_file_size_using_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/dwarf_fortress_flux_stone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/laser_rifle_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/wepadanafanufojon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/in_dreams_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/94154855799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/jiritanokujafapoxuxisuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/70392495597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/eduardo_galeano_libros_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/39880218696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/17978123093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/sebeneji.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64E 5048 bytes
SHA-256: ad7bdb952bfecc5d632afaa85c25da44a4e299e47b70ecd0dab55e710016a456
font_01_sfnt_off0000c754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC754 15136 bytes
SHA-256: 5382a884e18b62a418480a11c47ff0ccbf4a499f7a6869952b8b2d5958eac9a7
font_02_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361