Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca7f5bbcfcfe6df…

MALICIOUS

PDF

44.7 KB Created: 2020-10-15 01:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee0de6d768b2f134d75f006b248af942 SHA-1: 4177d85d3fc9c839c22e85b64b9b2eb6a7648ef3 SHA-256: aca7f5bbcfcfe6df87e81a9d1b9feed7c74b6ed15a758aca89661273f093b6b0
194 Risk Score

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://gettraff.ru/pify?keyword=medela+pump+in+style+advanced+user+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87698900ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f87515f6120b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f877d8023e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8774ff3ea51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f872ef62698e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f874bf3d2ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f874d8fc841f.pdfIn PDF document text
    • https://site-1039350.mozfiles.com/files/1039350/32689152830.pdfIn PDF document text
    • https://site-1041372.mozfiles.com/files/1041372/piwuzelunexupil.pdfIn PDF document text
    • https://site-1039636.mozfiles.com/files/1039636/81907699032.pdfIn PDF document text
    • https://site-1042017.mozfiles.com/files/1042017/19601862201.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/1/0436/9245/8139/files/power_source_battery_charger_power_supply_model_pc50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3116/6615/files/wool_and_linen_mixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5b6b49-981e-414f-b3ad-4d9e0b2aa766/rirabiwojazav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc94df12-7093-4f5a-97d9-cae111c0d533/22473902535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc6e72c-4518-4ed6-b9be-21d09cc16657/sarixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2537a767-18f5-489a-be34-51711db1dff3/97743254350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a603a18-8f29-4130-964a-6cd44b0a0569/43585785029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/persuasive_speech_outline_template_monroes_motivated_sequence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8126/1750/files/smsl_su-8_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4280/6679/files/65484702207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2478/7867/files/orvis_dog_beds_for_cars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0362/9727/files/54452838980.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 5560 bytes
SHA-256: e2ae3867a179afb4f6e35d35507c1bb74fbdad4eed165f7a118aec1cb09c6906
font_01_sfnt_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 10336 bytes
SHA-256: d03c3012af5f370951666030e26c62089b2695b9c872068c16218b1df1313398

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