Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a8c26f4d5c1474…

MALICIOUS

PDF

49.9 KB Created: 2020-08-19 06:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57064249e8cb2ea7fa51cd9582297a99 SHA-1: 7a29caca5cbff0934fa938483bd109cc35216984 SHA-256: 11a8c26f4d5c1474da96dd4b2d43814068f9ed0e8accff8c0b7733b00c7a6030
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, disguised as a PDF download. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector link confirms a phishing or social engineering attack pattern.

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=manual+testing+aptitude+questions+and+answers+pdf In PDF document text
    • http://rujur.tyrellheaton.com/uploads/1/3/1/0/131070420/87ab9.pdfIn PDF document text
    • http://files.bendingsolutions.com/uploads/1/3/0/7/130740112/82f6c867afd5bd.pdfIn PDF document text
    • http://files.kunagoldparents.com/uploads/1/3/0/9/130969211/6d052e.pdfIn PDF document text
    • http://nojiwu.mariagmaas.com/uploads/1/3/1/3/131379578/8550346.pdfIn PDF document text
    • http://files.mowmylawnonline.com/uploads/1/3/0/7/130775969/39394aca.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/1/0430/8752/8103/files/10803314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/43795908922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/possessive_pronouns_in_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/91124586636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4046/1220/files/advantages_of_renewable_energy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/30739424698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2790/9019/files/35664838096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/budismo_esoterico_japones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/microxp-_0._82._iso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/zolitigisudugiwide.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_off000084cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CF 5432 bytes
SHA-256: 3915548019fe02e922fad4d44b5ff1f1b21b1e1720c08ff3d30b5cebae169621
font_01_sfnt_off00009766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9766 10308 bytes
SHA-256: d04ad7536e8c502aecaf3911383e63457d14c60055816897b23f9d04c467ccdb

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