Malicious PDF — malware analysis report

Static analysis result for SHA-256 155985f7db45c66b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 03:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbd66ff28d9b6fc125c35fca718d4e81 SHA-1: 9e41116d15cae53f20c998e75b5cf690f19e93c0 SHA-256: 155985f7db45c66b0ac45c6ebb476ae8c3e5dd4c6dee11282fdd3df056054459
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a datasheet, suggesting a phishing or malware distribution attempt. 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.cc/pify?keyword=cmos+4069+datasheet+pdf In PDF document text
    • http://files.fairygrasshopper.com/uploads/1/3/2/7/132741110/7d541fc.pdfIn PDF document text
    • http://files.littlehandsandfeetdoula.com/uploads/1/3/2/7/132740234/6acf9c.pdfIn PDF document text
    • http://mawujute.misplacedchef.com/uploads/1/3/0/8/130814328/kifef.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/1/0432/3350/9535/files/ataullah_shah_bukhari_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/zozawipelajofuponefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/41632364394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6220/files/fram_oil_filter_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/netflix_series_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/78266340455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/8875916685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/78378289456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/55523592454.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C2 4068 bytes
SHA-256: 0e98be67eba76635c4b8fe859c6685a7f8be9ebe5c5fe1cf367e745f4f5b5c2f
font_01_sfnt_off00005f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 5600 bytes
SHA-256: 96618bd742302308a64a822f1478f920b6b0df7699049c2048f214bf9b06d15f
font_02_sfnt_off0000722a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 10540 bytes
SHA-256: bb465f1a0293ad03b069cec9810bcca07e5dad6f2c1cb7ddc2c43b788ba07e5b

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