Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddd890bf50b520e…

MALICIOUS

PDF

49.5 KB Created: 2020-08-14 09:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06be21e8e5a61102daaf1177db6b1513 SHA-1: 3b2bb5da3ae1c75f8daad615646b61137ac627ad SHA-256: 3ddd890bf50b520eb09dd971885a07cce3f32873e39eecb1a518f351de5c4cb8
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, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL: https://ttraff.cc/pify?keyword=affirmative+tu+command+form+of+comer.

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=affirmative+tu+command+form+of+comer In PDF document text
    • http://files.en.msp-lawoffice.com/uploads/1/3/1/4/131406433/mobumikefe_sajupebugodow_vikapup.pdfIn PDF document text
    • http://files.htradingpost.com/uploads/1/3/1/1/131163718/efdb086061.pdfIn PDF document text
    • http://mitomida.thebloodcrowstories.com/uploads/1/3/1/1/131164250/suserepinonire-rutejifonu.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/1/0431/6954/6395/files/94920617218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0570/5374/files/form_6401_usps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/xeranevudemimamuvax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8759/files/79714599677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/59827074514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/wigum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4488/3880/files/wordly_wise_3000_book_7_lesson_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/knee_strengthening_exercises_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/11431830398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/56564179679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/download_os_x_10._11._4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/pizadijinakurunefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/exploring_biology_in_the_laboratory.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 5

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_off000083eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EB 5004 bytes
SHA-256: ed8f7cf6a353a197df0c05389aa1e1cd924e04c08456e6778a63cab07727d173
font_01_sfnt_off000094d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D8 10816 bytes
SHA-256: 2a8cbb8f64e6bc496a87b0af51b568e1b28314897e0b8a99f84605981423978c

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