Malicious PDF — malware analysis report

Static analysis result for SHA-256 406bd18c704f515b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-07 20:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a0250f770ab4aeb1e675da959710a37 SHA-1: 7069d4217266464d11c63ee609b2e2299afa8a15 SHA-256: 406bd18c704f515b374c44700231cbc81dc163ba2a4e9c17ba13d3c5c18e031a
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, many pointing to external PDF files hosted on various domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.com/wb?keyword=clearing%20fractions%20and%20decimals%20worksheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting the intent is to drive traffic to malicious or controlled infrastructure.

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/wb?keyword=clearing%20fractions%20and%20decimals%20worksheet In PDF document text
    • http://files.sandboxbookstore.com/uploads/1/3/1/8/131858916/fijubijala-naboxofibujotop.pdfIn PDF document text
    • http://xuvenoxib.standrewsweb.com/uploads/1/3/1/0/131070722/tiwepotojuze.pdfIn PDF document text
    • http://files.chipplondon.com/uploads/1/3/1/3/131379868/makolenomut_winefuta.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/1/0438/2910/0701/files/lemedonurexekujaripemaret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/69913162279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/jorimebifuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/58878739178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/39100924969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/zejamudefifab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/fedabezefobonelovokolubap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/pelabagemab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/51046092512.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_off00005e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4E 5496 bytes
SHA-256: 9460f3f8712636e94a0824009ff7ed06e0779ec661828d27e76948689c82de35
font_01_sfnt_off000070e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E9 10440 bytes
SHA-256: d7d460cec5d61cd9a4d73088e31e5a974779c928a1b508fbc51d94e461ff65f2

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