Malicious PDF — malware analysis report

Static analysis result for SHA-256 f888d319e9698a92…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 12:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 574e4064b159fb3130ad3b3bf1ae0ec7 SHA-1: 0033caef4bb554e6b6b1c93edccd923d13a108b0 SHA-256: f888d319e9698a927caf85665b7d15eb87c40ff5e1e52e58d518674c8813bf7c
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to interview questions and a URL that appears to be part of a link farm. This suggests the PDF is designed to lure users into clicking malicious links under the guise of helpful content. No scripts were extracted from this sample.

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=how+to+answer+interview+questions+regarding+teamwork In PDF document text
    • http://files.cvubaseball.com/uploads/1/3/0/8/130874359/a0e74.pdfIn PDF document text
    • http://files.microcosmetic.com/uploads/1/3/0/7/130776218/6886095.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/1/0433/4986/8712/files/lunutebure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32506959796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/kafupigofokonuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/catechism_of_the_catholic_church_baptism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/adalet_aaolu_hayat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/triangle_inequality_theorem_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/gonepurikobetag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/piweluwuzijirerubabogus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/alia_bhatt_pic_unsplash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/bearded_dragon_care_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74523611049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/taxidivofufonasosara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.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 5

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_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5296 bytes
SHA-256: a4821dda95f4ae06b521b1e181fd1ba81edc4c25b6c06ed3e5100dfedab1c02c
font_01_sfnt_off000074c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10220 bytes
SHA-256: 4faa66167acb0cb267ca4cee14b8fe9f73b99b0e93dfc1ef821ae3622eeabc2f
font_02_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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