Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53f00a9eeeb56aa…

MALICIOUS

PDF

50.3 KB Created: 2020-08-18 16:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6137f0dde367758bc59c086ad0afb34a SHA-1: 22cc9e2de6ef890c43d6bee9b754a9e1ace49a6a SHA-256: c53f00a9eeeb56aa932e0940d311c977c71131fa98312033abcb2f3ed90e470a
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, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the redirector. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing. 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=bleacher+report+college+football+preseason+rankings In PDF document text
    • http://files.what-women-want.co/uploads/1/3/1/1/131164574/putibe.pdfIn PDF document text
    • http://files.martabrysha.com/uploads/1/3/1/3/131380021/1247239.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/1/0433/4904/9499/files/67796109981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/86514955492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/metanosuxabemozixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6466/3967/files/3d_exporter_for_autodesk_inventor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/94207879377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/16275503637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/tafiwapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/vesazejatipunivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/18795865835.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 4

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_off000085c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C4 5528 bytes
SHA-256: 712e93f7fc4d25b5f434a37d85f3c0a757e8cefb442bc5255688ee156528a940
font_01_sfnt_off00009889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 10384 bytes
SHA-256: 0accf847f58444dec698b53af514b4741908adb50911793f384600e3772694c3

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