Malicious PDF — malware analysis report

Static analysis result for SHA-256 121addbccb401b5c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 11:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: efcf727788064d292c8bcb4364396d53 SHA-1: 82d30c1befafbfda3b97b4f2543e90a1f95bef81 SHA-256: 121addbccb401b5cb097719702dfcad3211482fdad3ca3045aeb2092e9c719f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body and heuristics indicate a link farm strategy, likely intended to trick users into downloading malicious files by posing as legitimate document links. The ML classifier also strongly indicated maliciousness.

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=un%20declaration%20of%20human%20rights%201948%20pdf In PDF document text
    • http://files.jim-caruso.com/uploads/1/3/0/7/130738852/bolafajabelapimet.pdfIn PDF document text
    • http://files.freshbrugge.com/uploads/1/3/1/4/131437778/gusolideridumel.pdfIn PDF document text
    • http://files.wellesleyhistory.org/uploads/1/3/2/6/132680986/4652867.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/1/0433/7369/1045/files/macroeconomics_paul_krugman_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/44208242791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/11061770830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/quantitative_data_analysis_with_spss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/libisotavat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/bible_quiz_genesis_1_50_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/mogadekakodunogoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/67158961054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89349082521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2802/0373/files/5010479092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/xoxuxewu.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_off00005aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFF 6048 bytes
SHA-256: cd1e6fe0bf7fdc7f383d89a6aa36369251a7c4a0d0955b2f049d1a355599c330
font_01_sfnt_off00006f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 9936 bytes
SHA-256: 0363507e98978b850143b14b5f03f3e1de51c2e483a76a8081ba9adceae039d4

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