Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4bdac3f5989214…

MALICIOUS

PDF

45.8 KB Created: 2020-10-16 01:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: bd5669b3e9f80af5202ecf5a0bf42668 SHA-1: 1860e1e8b999dabfa3ca03c6f0fd6a9db35141dc SHA-256: 4d4bdac3f598921425da6e71ab507bc88a1365f02f62f9d311f9c9b943b1f3f7
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://ggtraff.ru/pify?keyword=i%2527m+trading+my+sorrows+chords+pdf In PDF document text
    • https://site-1048552.mozfiles.com/files/1048552/70024225716.pdfIn PDF document text
    • https://site-1040578.mozfiles.com/files/1040578/vomegele.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/pozasenanekurubaren.pdfIn PDF document text
    • https://site-1040182.mozfiles.com/files/1040182/dukusukinadevojuxiwimoso.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/7aaa5693.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87e8bbe6bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8828fe649f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8722875c6a1.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/1/0483/7762/6784/files/46564976637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3336/1045/files/kebagojuturaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0509/5331/files/cbspd_management_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/90589267613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/ruraketewifanunosogixibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/kitab_permata_yang_hilang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7255/5674/files/wupujapidogakogosegoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2294/8264/files/kixixapoxoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9970/1406/files/custom_masonic_rings_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4116/3926/files/bamixipajasow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1290/9979/files/classifying_reactions_worksheet_answer_key.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_off000059d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 5372 bytes
SHA-256: 84687a3525f42144afce7262b3357f8d5094c1c6811b87789d75ef61fcc2ac0a
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 14552 bytes
SHA-256: 6757449ae48e2d6e1169463eb0397f8adaeee551e5306776b6d00c3f1182a5c9
font_02_sfnt_off00009994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9994 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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