Malicious PDF — malware analysis report

Static analysis result for SHA-256 da392cc175a5ed99…

MALICIOUS

PDF

34.9 KB Created: 2020-08-22 06:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a549fe404386a4ef968a250a1f84e76 SHA-1: e45dfeed4b9b5b81ab2ecaacf92310881bcf9cce SHA-256: da392cc175a5ed992f12b995798643f81fe69d300b17722f97b5a8df59f6e162
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations by overwhelming users with choices. No scripts were extracted, and the document body was largely unreadable binary data, but the link structure is highly indicative of malicious intent.

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=letter+p+dot+sheet In PDF document text
    • http://files.kingsthorpebowlingclub.com/uploads/1/3/1/4/131438234/4360009.pdfIn PDF document text
    • http://files.pucherosoundmachine.com/uploads/1/3/2/6/132681891/5a356db79d6ddc.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/1/0438/9509/5464/files/bukagakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/monetozuvibup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/38697843552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/zufelofivesog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/94685537673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/20999502091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9400/6177/files/letter_of_intent_for_job_promotion_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/dusuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/nibud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/belajar_photoshop_cs3_indonesia.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_off00004c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4D 4744 bytes
SHA-256: 0a2ee4cf4744332d439d276db2aaf0730472f2d6870af69aa658efec61af246b
font_01_sfnt_off00005c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6C 10180 bytes
SHA-256: a58bff844ed49fc6f9ceee58fafd13b9e82532f3f18946af73a3a6fe5ba268d9

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