Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5bd0945177805d…

MALICIOUS

PDF

48.1 KB Created: 2020-07-22 14:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: af4a1d46f2c96754f6be93a6870cd320 SHA-1: 0ea00050d047955f31a67c343ee0ccee7da39358 SHA-256: 9f5bd0945177805da6ee67d8d14084811ddbbf746b70cc5c33f8a9ca796ce916
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'introduccion punto de equilibrio pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.com/wb?keyword=introduccion%20punto%20de%20equilibrio%20pdf In PDF document text
    • http://files.buckscountysingers.org/uploads/1/3/1/8/131856108/juzoz.pdfIn PDF document text
    • http://files.clayguyry.com/uploads/1/3/1/8/131858540/6359358.pdfIn PDF document text
    • http://files.mrbrenlea.com/uploads/1/3/1/4/131453837/sikokufediza_mumiguza.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/1/0432/5251/4971/files/79962012556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7123/4467/files/wurilizagaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/8793337200.pdfIn PDF document text
    • https://jotunajaf.files.wordpress.com/2020/07/xazelawipanidenikifa.pdfIn PDF document text
    • https://rojapeb.files.wordpress.com/2020/06/81551905625.pdfIn PDF document text
    • https://natogobus.files.wordpress.com/2020/07/mibovi.pdfIn PDF document text
    • https://fazagov.files.wordpress.com/2020/06/gusegewolefuviji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/13818633719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/dugurapomevumuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/lekuxufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/43939179540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/pafavalerikituviwesoveve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/vabibapuvusegesusarom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/34461192884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/6538410098.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 2

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_off00007e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2B 4844 bytes
SHA-256: d5d498a87d346ef27b7d0aa070ff25aabb608f3708136257954c807228cd93a3
font_01_sfnt_off00008ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA0 11144 bytes
SHA-256: 72f30b14894a6cde0e7131a99587f0c91ab84cbdcd77321736cf43fcc42d35ad

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