Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacc3beb33420739…

MALICIOUS

PDF

39.7 KB Created: 2020-09-16 00:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8ec30c5578986bd7bafc4ed86206562b SHA-1: 138558b1fe3382bfbf2b6c06f1d7729eda9fc4e8 SHA-256: dacc3beb33420739d6e06620fd71be67995c998f12aa50ecc9a2e800776bbc00
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.club/pify?keyword=live+football+streaming+apk+free+download In PDF document text
    • http://vewer.centralmathshub.com/uploads/1/3/1/6/131636954/vamidula_penumutifixala_ravafusut.pdfIn PDF document text
    • http://nuxefab.davidagordon.us/uploads/1/3/0/8/130874575/zodaxexepepunuz_wejividutojeki.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://static.usrfiles.com/ugd/b8c837_81a1a1ea9071436fa46061a6bd567d35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_b424b7ea9abf4cd49de5abc9be1bf8c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3d9adcf7f3cb4488831910998b3b39ba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/be5703_3b99cefb88cf428381d55e7dc68904d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9374a7_97e20e15f63c462f99703be64e4216bf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5443/3183/files/job_recommendation_letter_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/16981852828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/64079030774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/60267533436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7721/4884/files/new_yorker_style_guide_umlaut.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_off00004e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9E 5444 bytes
SHA-256: 78f423484c7a0a022bac49a34b7aa22979c16729a6cd8ed92e8a4fabeedfe6c0
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 10164 bytes
SHA-256: e5662ebb76cafef5ae0cb2066cb6e450944ecc680fbb74c3a32174531da13092
font_02_sfnt_off000083d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34