Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cedbcff5bec43b4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-07 16:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9679a0a553ff4d0387d1f2ca3b985e61 SHA-1: b9da376314f55441370da7b99e06794ab285d0cf SHA-256: 4cedbcff5bec43b4af82f93a37e16206a7f955cc79db723e2eea334a6fc0bbe8
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free downloads, but the primary link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. This indicates a social engineering attack aiming to redirect users to a malicious site.

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/wb?keyword=principles%20of%20management%20by%20tn%20chhabra%20pdf%20free%20download In PDF document text
    • http://files.livelearnsurvive.org/uploads/1/3/1/6/131637190/dd220df1b7.pdfIn PDF document text
    • http://files.bakedbyalice.co.uk/uploads/1/3/0/7/130740012/gigevogoj.pdfIn PDF document text
    • http://files.tidyfairyla.com/uploads/1/3/2/6/132681665/dd006.pdfIn PDF document text
    • http://files.awardsdayton.com/uploads/1/3/2/7/132712373/7032474.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/1/0428/5726/7359/files/68179251289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/melissa_and_joey_season_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/funoxirolemikojuzokipob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/26791487798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/99415167520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/tabasolofumuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/49091229035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/xataxiredeboke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/77740219563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/algebra_textbook_of_10_std.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9265/5780/files/28823647978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4337/9617/files/astm_a536_standard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/4162044296.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: bakedbyalice.co.uk 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46EB 5904 bytes
SHA-256: 45e93f320cc0956864ff6290e10306b6f7bb5c4994fcff197686ac14e93703cb
font_01_sfnt_off00005ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE3 9640 bytes
SHA-256: 28ca19229b4d616c860f2c94037dee5fed24858987c411f18bf426d64114f8f3
font_02_sfnt_off00007c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1