Malicious PDF — malware analysis report

Static analysis result for SHA-256 1375b1fe78c059ea…

MALICIOUS

PDF

37.5 KB Created: 2020-08-12 01:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29ca1c49327f3ca64931ab09e9a96357 SHA-1: 3214072c6e2aafe9cf92d6426410219b8254a910 SHA-256: 1375b1fe78c059ea7424f8af945472cf9ba215403ef99590c7157e5dffa9c153
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites.

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/pify?keyword=adkar+sabah+pdf
    • http://xumawo.shootacademy.co.uk/uploads/1/3/1/4/131454012/zebilinuwujig_tobugifijojelor_nitezuloropi.pdf
    • http://files.univerdant.com/uploads/1/3/1/8/131871569/85c677fa73.pdf
    • http://wufotopev.empireicenyc.com/uploads/1/3/1/4/131483416/e2887d7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7806/5055/files/23065807868.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/logitech_hd_webcam_c310.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/47243252311.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/91954591428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/423234735.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/zesovebutazunukivata.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/godadujigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/5363439845.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/samekadewinijakira.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/2358823342.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/asset_management_download.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_off000058ba.bin
144c50843f9255e9e11402285186714fb6d2b94ccea975e781089a62829e29fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BA 5288 bytes
font_01_sfnt_off00006aad.bin
935d73490fd31b222b3b59071c362a7c5a2e44583cf95165992e935a59455a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 9044 bytes