Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d82a424fec9c6b…

MALICIOUS

PDF

36.5 KB Created: 2020-08-25 14:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd76621485103c02a1ad4f51c2049342 SHA-1: 33cf6b8015b59b77f2696adf274f445724414f10 SHA-256: 20d82a424fec9c6b1a6cde3334ba1b89b9c9c831d1a8e22c44bfae5e11fdc810
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.ru/pify?keyword=chest+guidelines+2016+update In PDF document text
    • http://files.tnhempfarmacy.com/uploads/1/3/1/6/131606487/demirudipudobasisom.pdfIn PDF document text
    • http://files.luxefamilyholidays.com/uploads/1/3/1/4/131453031/tamuresoduvuve.pdfIn PDF document text
    • http://files.basil4.com/uploads/1/3/1/1/131163902/4321331.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/1/0432/4609/2443/files/81478341312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/nawetemezavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kelapegomovezoledazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/76264678100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/42716445117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9567/7346/files/12mhz_crystal_oscillator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/add_two_lists_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/royal_canin_small_dog_feeding_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/xebalavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2480/0151/files/11789000506.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_off00005170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5170 5512 bytes
SHA-256: 96ca2930dc2db6603d83b756814082ecd93e00737c26faf7ce03641a156aca8b
font_01_sfnt_off00006420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 9732 bytes
SHA-256: 6fbafae436a17eb12071d622525270daa581ee41ce8516a7cb38cbcda0290fd6