Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd4ae73fba57b4a…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 02:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe888ad73b0463ecf8b01bcd864f4c85 SHA-1: 3d59f12c8d1cb084bacc34b858c9ed9263fd52c4 SHA-256: fbd4ae73fba57b4ace93014ad83d3c3ada525da54bb6396d208343c91951f518
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, indicating a phishing or malicious content delivery attempt. The document body, though heavily obfuscated, contains text related to 'temperature conversion worksheet' and the malicious URL, suggesting a lure. The presence of numerous external links, many hosted on Shopify, further supports the link farm heuristic, which is often used to obscure malicious destinations.

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=temperature+conversion+worksheet+kelvin+celsius+fahrenheit+pdf In PDF document text
    • http://files.claireallegrataylor.com/uploads/1/3/1/4/131438120/ce1bced.pdfIn PDF document text
    • http://files.lisaguice.net/uploads/1/3/1/3/131383837/ruzifuzeded_jububojirumifu.pdfIn PDF document text
    • http://files.immortalpop.com/uploads/1/3/1/6/131636995/zodiret.pdfIn PDF document text
    • http://files.katiemachain.com/uploads/1/3/1/4/131455283/57a787ca629.pdfIn PDF document text
    • http://files.eatmooreproduce.com/uploads/1/3/1/8/131856160/da723b3.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/1/0429/0058/6649/files/51146555624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/guzexemago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/ps_ainda_te_amo_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/xudufetazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/72620686488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/napawopikixoxezikixom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/84063750249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/heart_of_worship_guitar_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/tinifujaxaratesuzenav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/adobe_acrobat_reader_for_pc.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_off0000600e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600E 5444 bytes
SHA-256: b9ad3c78a2053f7161437c87e1de9e69b2d00c74642ff7f3925892306c49bf8e
font_01_sfnt_off0000726d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 10052 bytes
SHA-256: 9d5eb549ed09a93042c04b84566cb7aa31e83da9e5ebda54c8833694e677ac38
font_02_sfnt_off000094c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2