Malicious PDF — malware analysis report

Static analysis result for SHA-256 c455be6caaaa9b85…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 12:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc1cf6df1f5f2c249bf96ccf979e7a77 SHA-1: 3d4ac7146f17dcd1e206731b972e2b3770022809 SHA-256: c455be6caaaa9b8554acc6fd99610c045ce13ece0ac1170cee9ed24903483ba1
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.com, which is part of a link farm designed to trick users into downloading PDFs. The document body, though heavily obfuscated, contains the same lure text and URL as the malicious link. 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/pify?keyword=angular+8+tutorial+pdf+download In PDF document text
    • http://files.independencepyro.com/uploads/1/3/1/4/131407315/3461579.pdfIn PDF document text
    • http://mojonut.spstheatre.org/uploads/1/3/1/3/131380042/4b153.pdfIn PDF document text
    • http://files.andamanfrontiertravels.com/uploads/1/3/1/4/131453221/6ed0187f7.pdfIn PDF document text
    • http://files.leahblits.com/uploads/1/3/0/7/130738614/pamitejo.pdfIn PDF document text
    • http://files.gillettehandyman.com/uploads/1/3/1/3/131398428/koduza-zesenedafate-xawunalisiwado-bofifumisow.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/1/0431/0315/8433/files/4220989671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/tumedoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/79617944993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/valokoxubumapugesetut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/95617130654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/bujutasagarovolari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/lilasunonafadoxenasuvosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/exerccios_moluscos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/lelilupelexutepopoxinodaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/53963169347.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_off00007a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A83 5304 bytes
SHA-256: 73e4ab79346d82acdd58492ff70473e440b7f2ba3e58d897914507cae4822078
font_01_sfnt_off00008cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 10132 bytes
SHA-256: b0a68ac27397b877f3dd1b66f00607031e5f5b97dc05b169a1874e800affec7a

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