Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e3b17bbb111777…

MALICIOUS

PDF

51.3 KB Created: 2020-08-31 06:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3707f95a8d0294dc7d8706b20f960a7 SHA-1: 5bb336b8e03c7e4281efab5834ab5b28a9c175a7 SHA-256: 84e3b17bbb111777804b5a5fdbdd186822293fc06a7d898ea15278d881d99d0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One critical heuristic indicates that the document links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=carlill+v+carbolic+smoke+ball+judgme', which likely serves as the initial lure to a malicious payload or phishing page. The document body contains garbled text but includes the malicious URL and several benign-looking PDF links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/wix?keyword=carlill+v+carbolic+smoke+ball+judgme
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/gasusonobunudexatumufoga.pdf
    • https://cdn.shopify.com/s/files/1/0447/2055/4138/files/best_fifa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0436/1535/5042/files/sap_s4_hana_basis_administration.pdf
    • https://cdn.shopify.com/s/files/1/0454/1176/2344/files/fancy_nancy_pumpkin_book_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/apprendre_a_parler_le_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/42672647178.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/battle_angel_alita_manga_mega.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/56108121703.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/1259949741.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/facebook_cover_photo_template_psd_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_d87134b51c754a6f99a83597c7862a2f.pdf
    • https://static.usrfiles.com/ugd/8acad3_9ee95e6d226b444b9fc20267247b76a2.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_off00008900.bin
3f02806801a90d863bd05a63a1619455ba7679ffe1ad7aca8b676b6d4c041df5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8900 5504 bytes
font_01_sfnt_off00009ba8.bin
096c9ee0b3efa06e6f249cb649df40375216ba078a208dc0c703e4370aac751d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA8 10832 bytes