Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3dee62c8b37476…

MALICIOUS

PDF

48.0 KB Created: 2020-07-20 21:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9f9e701fb5306a4f65f47e730ff01c53 SHA-1: 9f25247592a90e0b281d45bfe4eb3070eb73e2b1 SHA-256: 4b3dee62c8b374765f9bde9f8ec9688f6f5d2a308244516813d93e3d40892c6b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, disguised with a seemingly innocuous keyword. Additionally, it hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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=popsicle%20stick%20bridge%20project%20pdf In PDF document text
    • http://files.beaverpastoralcharge.com/uploads/1/3/1/4/131437969/9794437.pdfIn PDF document text
    • http://files.nunes-ueno.com/uploads/1/3/0/9/130968956/9a1404c29.pdfIn PDF document text
    • http://files.apollosmartbet.com/uploads/1/3/1/4/131438449/xabuwojiponako.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/1/0437/7850/6904/files/tupunisiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/63356291636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/pomulotokikifupito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/17136805276.pdfIn PDF document text
    • https://xurujasija.files.wordpress.com/2020/07/59816412536.pdfIn PDF document text
    • https://lurufoduge.files.wordpress.com/2020/07/18757712233.pdfIn PDF document text
    • https://xikijowo.files.wordpress.com/2020/06/lagapumakenuwuve.pdfIn PDF document text
    • https://fozevet.files.wordpress.com/2020/07/pemusamanukilabovutomowux.pdfIn PDF document text
    • https://pasarilarob.files.wordpress.com/2020/07/72123352628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/86692156751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/28122451966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/94318464582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/fetomomawapexiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/fitelomenuga.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_off00007f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F10 5076 bytes
SHA-256: b4c8f7edab555221c9df6f7830e6e632fd68742e51a5dbb2b96030384682b3a3
font_01_sfnt_off00009061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 10080 bytes
SHA-256: 855ec7713c88907fcb80c9b74a014355fa20327f3470aa5df5f3f7f48177d053

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