Malicious PDF — malware analysis report

Static analysis result for SHA-256 118749accac040c0…

MALICIOUS

PDF

32.5 KB Created: 2020-08-23 11:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bcade6fad3ea2d3ac56d145c11a21a5 SHA-1: a9e3aa8b540b3f59239fc1e71b4392ae355689a7 SHA-256: 118749accac040c0e55ec88be3d98e5ed724d013a10ce9d0ffcbb3b399982221
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a known malicious redirector. The document body text and heuristics indicate a lure related to a 'basic grammar placement test' to encourage users to click these links. The presence of a malicious redirector suggests an attempt to lead users to further malicious content or phishing sites.

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.ru/pify?keyword=basic+grammar+placement+test+pdf In PDF document text
    • http://files.pjpexotics.co.nz/uploads/1/3/1/3/131398250/visisuve-nojelomawak.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/1/0429/5373/6348/files/betaflight_f4_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7400/8726/files/18841080392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0019/1400/files/cardiac_rehab_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/84158220030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/creative_process_in_gestalt_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/auto_repair_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/desipimiwusixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/winaretikikopase.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 1

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_off000041da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41DA 5524 bytes
SHA-256: 4528967a0ab774fa0445281d38aea36d96b4133d7563828271abea416bd51610
font_01_sfnt_off00005485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5485 9680 bytes
SHA-256: 1e1a0b38b22f366d1386642959d548e9eaf858034c580f6c3a11f8d439ef54e5

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