Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf12cae8baddf13…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 18:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fee99f920e003d09dfff12f6f2c34e10 SHA-1: 3eaa94343b4d4138911d9e7c3ac6d1e79f64ba6c SHA-256: ebf12cae8baddf136e8b0eef06f5dfe4a65c41fc0280c5e5586f54f113c0b828
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. It also fires for PDF_SEO_LINK_FARM, suggesting a large number of outbound links, many hosted on Shopify. The document body, though partially corrupted, contains text related to 'research methods in psychology exam questions pdf' and the malicious redirector URL. This suggests a social engineering attempt to trick users into clicking the link, likely for phishing or malware distribution.

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.cc/pify?keyword=research+methods+in+psychology+exam+questions+pdf In PDF document text
    • http://files.thechironcenter.com/uploads/1/3/0/9/130969654/1ef979b2bd7e.pdfIn PDF document text
    • http://didurujaw.7thbattalion13thartillery.com/uploads/1/3/0/9/130969472/4932661.pdfIn PDF document text
    • http://files.petergallant.com/uploads/1/3/1/3/131384663/e5514b895.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/1/0430/1045/7753/files/31201209593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/49132404126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/12906763552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/bafesumow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/sepejadamevurub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/11222627598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/43245507070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/tadelugegakokanelirafugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/software_quality_assurance_pressman.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 3

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_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 5872 bytes
SHA-256: 4fa9a647432bc3c66a0abef814a2e333be253cef92fb43d49f7045665d5bbb9d
font_01_sfnt_off00007b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 10076 bytes
SHA-256: 91f690db8fab3e9ba16f53b349c1e3534540a1069186467d6a895d5d9cbfa28d

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