Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a0930ff4743e86…

MALICIOUS

PDF

42.8 KB Created: 2020-09-12 19:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c9ab608f9e1ca6e2c43421b930ebe107 SHA-1: e3913ed928da0890b7b53401e11b11a966fa9bb1 SHA-256: 46a0930ff4743e860b0020ded6e8a6e854c53d36eca7d08b386c4e318c6220da
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=word+that+start+with+rr+in+spanish In PDF document text
    • http://files.corinnegarcia.com/uploads/1/3/2/7/132712332/wirinitiza.pdfIn PDF document text
    • http://dulob.s-townhs.org/uploads/1/3/2/3/132303072/wivitosipadijomiru.pdfIn 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/1/0433/8342/3128/files/jopapilidipivubed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/51753040480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6200/1563/files/kumisomexavozubutemegib.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_bb8ee805b0a1408baff4daba1d8359e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a7407_15bd992fb96c4252a42b4620aa774a41.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/140efa_f93c6bf3bc3048fca36a89bb58811db3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f9b04_bf4065c6f74e4681b59f563dc8306874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/katituzobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/puxewomajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/gofotenalisusezoxitezujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/greek_bible_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/92613224005.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_off0000699e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699E 5120 bytes
SHA-256: 43485995f76fbf559ffe8bd385073cf5bcaf689f28687dc9a215c225c998a8e6
font_01_sfnt_off00007b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 10520 bytes
SHA-256: f7b742bd7a792b28b3a6765d6b0051998adde68390c6a4f32979416cbadc955e

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