Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcaa90c1d87732b…

MALICIOUS

PDF

40.4 KB Created: 2020-10-07 14:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ae66b76f1e8becb0e0fa1b8f1b69dfb5 SHA-1: 5966fa03fee9d3761e8abf75607ac8492d6e37fb SHA-256: 2fcaa90c1d87732bab1c605b14b4be460131d4817a3a9a1fd0c1e572c858eeb4
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=good+airbnb+welcome+letter In PDF document text
    • https://site-1041210.mozfiles.com/files/1041210/fusoko.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/beremigasiximo.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/lomiranovegetubon.pdfIn PDF document text
    • http://xutut.bestnonslipheadband.com/uploads/1/3/2/6/132680949/ginines_kamivodok.pdfIn PDF document text
    • http://files.annabullis.com/uploads/1/3/1/4/131453274/gonotazananimemud.pdfIn PDF document text
    • http://bavasu.totsandco.org/uploads/1/3/0/7/130776089/zuwir-gilatewil-sisas-fajid.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/1/0484/9260/9686/files/alcohol_infused_whipped_cream_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/46525865986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/calories_in_jersey_mikes_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0352/2468/files/blue_exorcist_season_3_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7503/1206/files/kenakasamutekubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/maplestory_ark_guide_reddit.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_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 5172 bytes
SHA-256: 6b537c8644426925dc23c0264f02bafa8c5d57e0294c61dd28b2c640ab75e53f
font_01_sfnt_off0000716b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 10476 bytes
SHA-256: 7174d8f4694a38f690fa9b2967babb72b8c66491ca8bedb27ed1a169161be638