Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d752d3eb5a9a9e8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-09 02:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73958812cf6a797292fc85616682af41 SHA-1: a2d276628de70efa0c406b70c7c03a0ff8716747 SHA-256: 4d752d3eb5a9a9e8f69ea4f8757a7ff58fce03424780e8910b75709dfc9ca15c
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs pointing to external resources. This suggests the primary purpose is to lure users into clicking malicious links, likely leading to phishing pages or malware downloads. No scripts were extracted, limiting further analysis of the execution chain.

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=isometric+questions+pdf In PDF document text
    • http://guwob.sarmitesstudija.com/uploads/1/3/2/6/132681579/5499299c93a454.pdfIn PDF document text
    • http://files.scottschick.com/uploads/1/3/1/4/131437567/3969761.pdfIn PDF document text
    • http://files.focusworksedc.com/uploads/1/3/0/9/130969546/zulizawawesawaf_gofed_surexezagamat_botewup.pdfIn PDF document text
    • http://gasig.lapetitelocket.com/uploads/1/3/0/7/130775085/258e632f6f605c.pdfIn PDF document text
    • http://files.profileperformancedirect.com/uploads/1/3/1/3/131379290/duduxuwulobivaki.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/1/0431/1475/8293/files/vamiputajujalexozupufokuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/fesubakogerakeguzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/13762961100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/xuxefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/91793473441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0623/7604/files/keto_diet_plan_uk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/lesorawupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/2813218151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/aka_in_a_sentence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/case_study_method_advantages_and_disadvantages.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
🗂 Part of campaign: focusworksedc.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FE 5004 bytes
SHA-256: dbf271a7055100736b5a0277d1502de992f66ba90862709dd442503bd5c2d31f
font_01_sfnt_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 10324 bytes
SHA-256: b821ee80d4c28c8ceba9654ceb5b20a9da0d81592d84ca64e10399e4adacd035
font_02_sfnt_off000089ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89ED 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3