Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42d1038c26f79b0…

MALICIOUS

PDF

65.7 KB Created: 2020-07-22 19:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 332829ef2ecb936e60c7d6873d9edfaf SHA-1: 43a67b1bfeb81e318b837d0dee53689d31e6ca8b SHA-256: d42d1038c26f79b0e2e3ae40e8ac2614814596164ccf08cc6b41dba1a0b0ea1a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to educational materials. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=active+learning+activities+for+college+students+pdf In PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.trueelegance.com/uploads/1/3/1/4/131437977/xudab.pdfIn PDF document text
    • http://files.wonderfullifeproject.org/uploads/1/3/0/7/130740429/fixetarepev_sisedepolewexoj_fafedatun.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/1/0433/3672/8726/files/44441045550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/98865180316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6004/3682/files/luxuxowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/fogepozavosidemupotipo.pdfIn PDF document text
    • https://gugotuka.files.wordpress.com/2020/06/zokokuwim.pdfIn PDF document text
    • https://jovemubam.files.wordpress.com/2020/06/vakutako.pdfIn PDF document text
    • https://dodibob.files.wordpress.com/2020/07/55758597726.pdfIn PDF document text
    • https://kozogerut.files.wordpress.com/2020/07/zuzexifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/bolabijamumizogubek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/47443071495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/sawusurokero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/12075373560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/koretib.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_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 5252 bytes
SHA-256: 4ffc8aa0eb3e4e8f7b42395d2e002cf9f3527f3a46f1688526a0a22ce234ee03
font_01_sfnt_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 10920 bytes
SHA-256: d99b4b7638944133cc9a4198930b2ab10c1b5d6ec0131e75dcef817039e85f02

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