Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef350af5b2147b35…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 05:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a6661c3558f3748c3a23394737206c0 SHA-1: 60ec84a6d4bf6bab587a7d75b846a893704ca9e0 SHA-256: ef350af5b2147b352d588e5ace8a5cc3fcd75c526738ff9d8cab7436681ae081
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure related to 'Virgin media answerphone service' and includes a link to a known malicious redirector. The heuristic 'SE_CALLBACK_LURE' indicates the document prompts the user to call a phone number in a context of billing, refund, or security, consistent with callback phishing or tech-support scams. The presence of a link farm, with many external PDF links, suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=virgin+media+answerphone+service In PDF document text
    • http://files.openingnightcostumes.com/uploads/1/3/1/3/131380504/roxapoparapan_seser_tujoja.pdfIn PDF document text
    • http://taninamo.faceartandmore.com/uploads/1/3/0/7/130775997/6843a3.pdfIn PDF document text
    • http://files.escaperoomelectronics.com/uploads/1/3/1/6/131606807/bumexupa.pdfIn PDF document text
    • http://xudenonag.lamsgolflinks.com/uploads/1/3/1/3/131384605/8800960.pdfIn PDF document text
    • http://sosodaro.studio1999.shop/uploads/1/3/1/1/131164250/9503018.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/1/0437/4475/5866/files/canadian_passport_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/neverware_chrome_os.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/gixunerup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7689/5129/files/gravitational_potential_energy_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/biwufiwupol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/23786838055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2746/4097/files/top_rated_hair_dryers_consumer_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/wefiwamumetuzisoxax.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 7

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_off000059e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E8 5572 bytes
SHA-256: 3802081133545786fe4b37623ff390ffadeaa118c321105a2a3f1732aca0ecb5
font_01_sfnt_off00006cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 9948 bytes
SHA-256: 54862171bac07e444390f81627ed0c578d8d30501f3a06b331ed3af6d8a49fa5

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