Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28b7fca31e814c8…

MALICIOUS

PDF

50.7 KB Created: 2020-08-07 19:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc4ecf058fca7ad7e46c700e30287fd0 SHA-1: 05cd69bf033cc9b60bee166b462b598cacd94ec1 SHA-256: b28b7fca31e814c8905545e99e6a93b71c9cb0e8b1f2cc6124b15b112c6310db
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=slavery+by+another+name+douglas+blackmon+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. This indicates a phishing or scam attempt 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/pify?keyword=slavery+by+another+name+douglas+blackmon+pdf In PDF document text
    • http://files.engineeringally.com/uploads/1/3/2/7/132741556/1121019.pdfIn PDF document text
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdfIn PDF document text
    • http://files.mollymurraybirthdoula.com/uploads/1/3/1/4/131437376/8027104.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/1/0437/1336/4121/files/zukinis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/komowamave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/90562861637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/96117986704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/72132344065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/vimirojatinosunifukan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/11053444345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/37260548336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/85375102357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/kofekojigob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/rigivifuj.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_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 6036 bytes
SHA-256: 821b9fd7b395c69b551094f63874a15041d360f4602bebf503b04eb5c9773802
font_01_sfnt_off00009adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 10092 bytes
SHA-256: fb143955db5da622e19dd8505cfa4f0f1d955b1828776c3a7dda778428ab89e5

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