Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a5b35f66720725…

MALICIOUS

PDF

47.8 KB Created: 2020-08-25 04:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 785abc78229c218ea92d3d62533100b1 SHA-1: 9d5d72478315b54c3bf9b55c71610122a530416d SHA-256: 37a5b35f66720725227be37de85d9ec432d25bc6c543bb83f5a63f986c97ccfc
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Excel sheet working hours' and includes the malicious URL, suggesting a social engineering lure. The presence of a link farm further indicates an attempt to distribute malicious content.

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=excel+sheet+working+hours In PDF document text
    • http://files.kc-phramez.com/uploads/1/3/1/4/131453998/xolexenolulemuk-dobaxu.pdfIn PDF document text
    • http://govamam.interdynartis.com/uploads/1/3/1/4/131437502/xepeduwipo.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/1/0436/0034/7299/files/accounting_information_system_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/letetevesafakavegubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/86579964148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8982/2631/files/crystal_report_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/podirubapurokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/45484671803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/89397105376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8669/3798/files/formation_windev_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/deduzizarijaxojera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/papural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/40668052937.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 5032 bytes
SHA-256: b6071c68230941909876c38f2ccd6975d771910b22ec8d33e94043b4be85979d
font_01_sfnt_off00007a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A57 10008 bytes
SHA-256: 954d8bf67c979e06ff6dafff4f3e52f33e6646502cad61264b7e753b5f2069f0
font_02_sfnt_off00009cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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