Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028134a713b2a58…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 15:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b79ad604cc0b94e1cda1ebbb76ff8d2 SHA-1: cf8168ce3154b8d7596f74a9f37757569c01ac61 SHA-256: f028134a713b2a586ebe257d6e9711ee425b7f04e73f73f1b8d778599e24269b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with academic search terms. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on potentially suspicious domains. No scripts were extracted from this sample, but the embedded URLs and the link farm nature strongly suggest a phishing or redirection attack.

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=holes+anatomy+and+physiology+lab+book+answers In PDF document text
    • http://noregor.motscatering.com/uploads/1/3/0/7/130776688/widudigu_kaxojodorixokav_lisififi_sebamigojux.pdfIn PDF document text
    • http://xarivugiw.brcofoundation.org/uploads/1/3/0/7/130739385/kakijuvowa.pdfIn PDF document text
    • http://files.carolvoss.com/uploads/1/3/0/7/130738484/keken.pdfIn PDF document text
    • http://wakexoro.hipababy.com/uploads/1/3/2/8/132815176/55cff1.pdfIn PDF document text
    • http://zadav.rmarckantrowitz.com/uploads/1/3/1/4/131407535/6814046.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/1/0437/8827/1777/files/86402486275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/jomiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/nojek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/avery_template_8160_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/82296405708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/lilegamebuxatulexawasopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/cellucor_alpha_amino_performance_bcaa_powder.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 8

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_off00006732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 5732 bytes
SHA-256: ec7eb6b8397fa6ae1aa78605411ee74094447daa7ac55ef671d3d0e8265071ff
font_01_sfnt_off00007a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A93 10396 bytes
SHA-256: 5db25b679b1da6367fc38f11547e1190d2a5a81d948d6db7a253c91996b3895c

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