Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f34e59b172f6c73…

MALICIOUS

PDF

46.5 KB Created: 2020-08-26 13:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 63757b4456c670d9ee24bfea48db7f01 SHA-1: 88e72a9adc8d47db8d50d11945a9072c2fcf85f6 SHA-256: 8f34e59b172f6c733bd6c8e653814ad0ddd68f270f0e51a1a263d7d6877eef89
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://ttraff.ru/pify?keyword=integrity+selling+for+the+21st+century+pdf In PDF document text
    • http://files.themercylist.com/uploads/1/3/2/3/132302759/8874201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/underline_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/vehicle_dynamics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/air_pollution_control_equipment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/vuvafutilosizosaderi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/56382524916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/17826923087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/desetidasarixiboforo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/6587456895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/57539016096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/blufftitler_latest_version_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DD 5312 bytes
SHA-256: 8fc93a31463f2598ade3c9b8a1c030cf30f605d05d5dc47f345f6b2021dd04b3
font_01_sfnt_off00007bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 10456 bytes
SHA-256: 82d412c6eb9782262fec2ee153c0f9e68cab8245b9754cde7ce25b9328ec87f6
font_02_sfnt_off00009f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F44 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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