Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51d77a3d0926ab4…

MALICIOUS

PDF

69.6 KB Created: 2020-08-06 14:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91da4460dc20b5ac9cd4ae07c2eb01eb SHA-1: 04fa5595b22729ba0a0d01898529caafcca37abf SHA-256: a51d77a3d0926ab48d4986733905538e7112678718ef7ec5156734710e56dea6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a link farm heuristic indicates the PDF was likely generated to appear in search results, further supporting a phishing or scamming 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.cc/pify?keyword=conformation+of+alkanes+and+cycloalkanes+pdf In PDF document text
    • http://files.holistichealingspa.com/uploads/1/3/1/3/131379040/lipupimuru.pdfIn PDF document text
    • http://files.annualreport-m2016.com/uploads/1/3/2/6/132696018/misipasefirefazorude.pdfIn PDF document text
    • http://gafusap.douglasbowie.ca/uploads/1/3/2/6/132682989/7694851.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/1/0436/9540/7269/files/how_to_write_a_good_readme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/50873108388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/55819327787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/21901003726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/imdb_barney_s_adventure_bus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/91871205169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lupow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7678/8134/files/b._ed_result_2020_hpu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/pazedeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6786/6278/files/cash_loan_agreement_format_in_tamil.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 7

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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 5372 bytes
SHA-256: 2d477553f835b2238a77141ede94d0aa4922b53f560b350b5a1b069a062d161e
font_01_sfnt_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 10712 bytes
SHA-256: 07d96f1897a79956cc2a587794e378be42995b0e720a7ea8ae24f4920aba931c

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