Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8223c3bf1606be…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 11:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13adb238c1550d49465bfc4444c1745f SHA-1: d958c8b0daee4d92775a56b3caf45a169f0d8b04 SHA-256: de8223c3bf1606be7b6cee5e9431ad214bde276608cea77062ed62592c28a96a
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 a book download, but the primary link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text 'Old man and the sea book pdf free download' and the malicious URL, reinforcing the lure. The presence of numerous benign-looking Shopify links is likely a tactic to obscure the malicious redirector.

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=old+man+and+the+sea+book+pdf+free+download In PDF document text
    • http://monemix.cathclip.com/uploads/1/3/1/4/131407406/e0a4a.pdfIn PDF document text
    • http://files.simplelivingstrategies.com/uploads/1/3/1/4/131438008/suzanuw.pdfIn PDF document text
    • http://files.smartrevivemobile.com/uploads/1/3/2/3/132303229/8755340.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/1/0438/2290/7549/files/zurekunefuvexokopejef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/85629351447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/bajaweputuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/diwalenagaditenefonik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/touring_bicycle_buyer_s_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/sajononusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/11731454481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/wukisujavegef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/95487676914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7903/3241/files/29499672748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/52232513076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/kimozuvivetolef.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 5604 bytes
SHA-256: 6cb0ee44bd807858584e7d9620ca595cbd862501ecce74838359492fa5427688
font_01_sfnt_off00007097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 10332 bytes
SHA-256: 17bf881799bfdb5bede1b8407bcfffeeaa97b3e6b1366c4ac60305acf9017abe
font_02_sfnt_off000093ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93ED 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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