Malicious PDF — malware analysis report

Static analysis result for SHA-256 700c81891c4d1540…

MALICIOUS

PDF

113.9 KB Created: 2020-09-06 22:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac78e13ef27fed69503a1823a010d5c SHA-1: f399c8c794d056e3f60aeb9b0b4f2227ec42e08e SHA-256: 700c81891c4d1540908aa073ec489a370ac03acdc1cda7e181ba4e24833a2cff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam, specifically mentioning lottery or parcel delivery lures. It embeds a link to a redirector URL, which likely leads to further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=adriana+lecouvreur+libretto+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/misusubeguwidadufip.pdf
    • https://cdn.shopify.com/s/files/1/0465/0139/6638/files/vaaste_song_naa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/super_mechs_hacked_accounts.pdf
    • https://static.usrfiles.com/ugd/16a96a_f352a15fd77b45d6a43ed72287718397.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/economic_zoology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/5438178443.pdf
    • https://cdn.shopify.com/s/files/1/0469/0513/1170/files/house_architecture_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/91306496051.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/31082671501.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/rekezafaxubilabekedezut.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185a7.bin
014471d62e6744539b97cf7dad90151d5f39315cf833782076e6d075d421a24b
pdf-font-stream PDF embedded font (sfnt) at offset 0x185A7 5160 bytes
font_01_sfnt_off0001974b.bin
055251f87b495da286465241475d4f5e87cef82cf33f39174b8bc1521cc60ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1974B 10388 bytes