Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e71d2e20b4854f…

MALICIOUS

PDF

34.5 KB Created: 2020-08-13 03:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a45a0891fd971d11ebd2c90d0292f8fb SHA-1: 5e52c20fc6cafeb278947fe310ae5cdf01370060 SHA-256: 66e71d2e20b4854f934f8f5d4a1fe324bdbe926c228841018b763c7dcec5c4f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body and embedded links attempt to impersonate legitimate Salesforce documentation, likely as a lure for users to click through to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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.ru/pify?keyword=salesforce+developer+documentation+pdf In PDF document text
    • http://files.drbrightman.com/uploads/1/3/1/0/131070362/8526000.pdfIn PDF document text
    • http://files.thetruthsayerswoodstock.com/uploads/1/3/0/7/130740571/2097480.pdfIn PDF document text
    • http://files.bondentertainmentservices.com/uploads/1/3/1/4/131452958/8131597.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/1/0437/6897/1421/files/econometrics_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/donemek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/61900484588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/mevimiwerapimob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/bisumubolosutibot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/61308250762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/35804511392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/cessna_172sp_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/webukozuzokopiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/resop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/kibivodakitibunasiwoloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/22901157293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/28441388901.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_off00004a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A43 5464 bytes
SHA-256: 1787ce7ef82abe126f5dc64af7ce5b6ffd4b20493769d8871e505e7ff41e42bb
font_01_sfnt_off00005cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 9496 bytes
SHA-256: c8cd512f7ae6a7cd60b35a08f24e44b49bee4dcfe8175642e581410c39454b39

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