Malicious PDF — malware analysis report

Static analysis result for SHA-256 53280680bf31a2a5…

MALICIOUS

PDF

52.9 KB Created: 2020-07-26 15:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 540a14b67ddcff93d5a951635fca920f SHA-1: 545e4a5face14071e7ca899ec288c44e8f81c17f SHA-256: 53280680bf31a2a53eee656a6c9ee9e3afbaba474ad8cd5e2455b68d31c715e3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, which is a common SEO poisoning tactic. The primary link points to a known malicious redirector. The document body, though heavily obfuscated, contains keywords related to PDF downloads, reinforcing the lure.

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/wb?keyword=urdu%20novels%20based%20on%20forced%20marriage%20pdf%20download In PDF document text
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdfIn PDF document text
    • http://files.lilacvillagebb.com/uploads/1/3/1/4/131437531/gamirifusow.pdfIn PDF document text
    • http://files.satorico.net/uploads/1/3/1/8/131856827/79a5623.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/1/0435/5037/6100/files/40407854994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/sejoxevajaporegiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/83268256308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/4484103805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/3052382620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/xibojewaxufurimarazuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/98918613248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/puribibifidofipaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/lugeguzubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/45998102543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/penalunopavozodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/21470459297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/75654323901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/30686352204.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_off00009011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9011 5560 bytes
SHA-256: 607010041eb6f9b3a8e696b5df074a213c444a83cb7d1fd58dd32b15e14ad3a2
font_01_sfnt_off0000a2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EC 10224 bytes
SHA-256: 62a03c0f416681d41f8af7cae0561cf122cb5f9eec8bc72a65e3a601f022ba44

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