Malicious PDF — malware analysis report

Static analysis result for SHA-256 22655c68ba9a7868…

MALICIOUS

PDF

44.9 KB Created: 2020-09-08 06:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3b06d5ed9860946ff0bde5ed0593fd0e SHA-1: 3db7f7fd930e2fb50885a0e5624a4c6c952b349b SHA-256: 22655c68ba9a78684b191bdbd331d028d486df49131b68e904ae52e007b298b4
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=spotify+premium+free+apk+offline+mode In 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/1/0432/0467/3699/files/fomunitojifuxeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/zulojideziwedebevokemafum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/motorola_surfboard_sbg6580_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7437/files/mbd_english_guide_for_class_10_hbse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/colonoscopy_guidelines_alberta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/koneman_s_atlas_diagnostic_microbiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/75275932665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/nosagitimaviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/tijebobevonagatazulepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/nazegufizigasugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/apple_earnings_report_schedule.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b148e5_1ead64d1cf07458f9880be9320a0760f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a0905b_5940c20d7fc847cc86e7b2558473a515.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cfd0a_45ff7e0159d94a7b8e4589482db961ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de9003_e09a62ee5c844b5f8c5a9df05e078862.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c2007e_152c0c677221419fb95b54c0765347e1.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_off000070a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5276 bytes
SHA-256: fbb92f5fe64022af4dbd95ba627ce7031302e4672c05e27f9ce167ebc996a786
font_01_sfnt_off00008294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8294 10552 bytes
SHA-256: a75d870ada308d59986574fa4b041b6f65253b5066fbc33e7d613f4a8d2dd573

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