Malicious PDF — malware analysis report

Static analysis result for SHA-256 7178cf59d998c5ac…

MALICIOUS

PDF

33.3 KB Created: 2020-08-28 09:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d7d0c06541706d34b1d9208201c769b SHA-1: a47ad85ffb64dfbf34a5d05f2d4e9fc611135f24 SHA-256: 7178cf59d998c5ac3fa319a079a8daa98c570fa909bc69912d6b26996ad8c2ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me'. Additionally, it exhibits a PDF link farm heuristic with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. These findings suggest the document's primary purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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.me/pify?keyword=don+pito+loco
    • http://files.melissaward.com/uploads/1/3/1/3/131398224/xozabuzux-zazan.pdf
    • http://files.stmarymagdalenewpg.org/uploads/1/3/1/8/131856531/badifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/45455342441.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/faliwerab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/30343248738.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/sanurelojuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/kasasuzobijagojerupepav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/bedudekalejidetelegozot.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/mekonuredupitud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0881/8333/files/java_random_number_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/solving_equations_with_fractions_and_decimals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/17780510218.pdf
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/jijinixigawigekulageze.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_off000044b2.bin
b3f86928c8a9e8419fef0702de9b729cefe659c749ed05dd2bc5f040a2257171
pdf-font-stream PDF embedded font (sfnt) at offset 0x44B2 4440 bytes
font_01_sfnt_off000053e3.bin
fbb9109453cca0071256c42cc4333ea0f7a6127aa406358a7356e88a2e53b149
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E3 11704 bytes