Malicious PDF — malware analysis report

Static analysis result for SHA-256 49436c4c9fe3fdcf…

MALICIOUS

PDF

44.1 KB Created: 2020-09-09 17:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8722f906a4336c48f762acc6afa2f6a7 SHA-1: 29ea2743c1f8a0afbc3086ae33d4658e693bbe8d SHA-256: 49436c4c9fe3fdcfa8b5f6a27d79b66838d737fabf447728182a6313d25576de
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.link/wix?keyword=android+layout+xml+templates In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/238140_65e15dea96a74ff29e690688814b6355.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/09c3c7_2dc8cd72976a44598102b167fb601330.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e78b77_02bf86da33e14c5cb35a23d8c6a13864.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87b9a8_fe4c732085224f31a772f25301ef16fd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eda9ba_4000bb4f1dca41d1a33c121f7d3a8b92.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc1a03_7dbebd0c3dd24e72b1bbcdb32a11af2a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d51d36_f101f194e43f4d55b9957b75aee8389e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01f9b9_47dd11b3ad574824b0574ad52949054d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/xolumiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/1952/8348/files/tsicet_allotment_order_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/28312465211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/totusetewanuragoburu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_c080c097d68341b9bb45f6a282753434.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10b11f_e5e297d811c745f5989341bb95a9554a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a07927_6d421604f1694c00aeec4a081cd43f6b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/724fb5_86873b6eebf84c9d8df47b20dcb982c9.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_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 5264 bytes
SHA-256: 1559a69f6d23b5894423601df8ff31375f733747ffec94aaf97602632fb3fa0c
font_01_sfnt_off000081c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 9928 bytes
SHA-256: 94c5d25f325d057d2ecbfab24a1eb1e28f411f2f59a170ad735598ab1ffd648f

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