Malicious PDF — malware analysis report

Static analysis result for SHA-256 1845f948c28e248d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 07:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0990e80044e7478ee16e69f655eb2df3 SHA-1: 43cffece0ef3b7324525cbb5fcadda087bd706d1 SHA-256: 1845f948c28e248de7536e484aec18115f233197d76f59d05a3edc56b0b0d9d3
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. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'Back button app for samsung'. This suggests a phishing or scam attempt, likely using the embedded links to deliver a malicious payload or redirect to a phishing site. The ML classifier strongly supports the malicious verdict.

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=back+button+app+for+samsung In PDF document text
    • http://files.littlelovesbaking.com/uploads/1/3/0/7/130738553/9057739.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/1/0431/2812/7637/files/dowujofuzijikiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/8080839810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/87206527745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/43762122807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/ncert_binomial_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2734/8121/files/nrc_motors_redlands_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0060/1504/files/business_intelligence_and_analytics_sharda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/4766246068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/electronic_access_control.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 1

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_off00006366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5556 bytes
SHA-256: 2677bc9117963609770e874df9e0d450f24d288b31e3c16fd59c846f8048acea
font_01_sfnt_off00007633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 9988 bytes
SHA-256: 61977578ea5e3b32509649036f8342fef969cdf6cec7086504c17514637a90e6

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