Malicious PDF — malware analysis report

Static analysis result for SHA-256 d457a4d8c280d9a5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-04 19:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04859a77dd11e3be3a521994ee8d5e2d SHA-1: 2e17e9850f96d3852a15fcb806bfc3bc3c01e4b9 SHA-256: d457a4d8c280d9a5db583cc7a5c37e285962cec68903e3c976c17dede3982d98
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'Capitalization worksheets 6th grade pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=capitalization+worksheets+6th+grade+pdf In PDF document text
    • http://files.sandrakreps.com/uploads/1/3/1/3/131384778/4753340.pdfIn PDF document text
    • http://files.livingstonworkforceservices.com/uploads/1/3/0/8/130874055/e3adc.pdfIn PDF document text
    • http://files.hudsonvalleygarlicgrowers.com/uploads/1/3/1/0/131070859/gabugalam-pugobajepir.pdfIn PDF document text
    • http://files.stmva.org/uploads/1/3/1/4/131453248/rulemubezirowexo.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/1/0447/3847/8229/files/calendar_2020_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/7860632010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/git_init_repo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/auditing_arens_bahasa_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/74980741617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/vikujujidop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/50068644811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/nebivigibiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/95050038326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/57355487923.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 8

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_off00006720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 5568 bytes
SHA-256: 3a9731a19e47bf143f734cd0c16b1053681a38345fda54ec0d6265ba0fa0b74c
font_01_sfnt_off00007a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 10104 bytes
SHA-256: ab19cb0ddc710478d87dbd120dcaf2f19952d0489c465b6169f72b8769eb9ed5

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