Malicious PDF — malware analysis report

Static analysis result for SHA-256 83329875f5a242b8…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 06:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2e1ad38a9570ab7b0cf619b4809de3a SHA-1: e43d88d39bec1a35fcc6bae13afc8d95b7e98c55 SHA-256: 83329875f5a242b83d27c000252e8d711fcbe6db94b4549ef443cb1de7bca37b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on what appears to be a link farm designed to host SEO-optimized PDFs. One prominent link redirects to a known malicious infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicates maliciousness, and the presence of a 'download button' lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=antonyms+and+synonyms+list+with+meaning+pdf+for+ssc+exam In PDF document text
    • http://viluwupen.shedrums.net/uploads/1/3/2/3/132303195/jefijizoz_denajalat.pdfIn PDF document text
    • http://files.tolecoons.com/uploads/1/3/1/3/131380213/xabuwala-jatibogu-tagevifome-mimeneso.pdfIn PDF document text
    • http://files.hsmcwa.org/uploads/1/3/1/3/131380063/vurepa_fevezozimob.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/1/0432/7142/2102/files/58221280214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/21565871609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/47812800928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/breviarium_romanum_1962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/gowoseni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/sozisazuguvekawufevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/alcohol_abuse_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/juzukisil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/fetefurobebafolalulamoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/49579877812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/bikezegidawuludik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4481/2438/files/tokajekow.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_off00007c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C51 5820 bytes
SHA-256: e8ba82aaf6656c8f56eea0249f3402c68e0a8d14184bd6c20a68cfa1f78f0671
font_01_sfnt_off0000900e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900E 10012 bytes
SHA-256: bc1cbb716926ba4eff92028cd85b7db95274dc5cabb2aedba040e1b7a0f9edae

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