Malicious PDF — malware analysis report

Static analysis result for SHA-256 6345025f5612387a…

MALICIOUS

PDF

82.2 KB Created: 2020-08-19 08:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c9446fb77d181c42bbd3b61a0409728 SHA-1: 86298a4f4906687c8a117b3378c12912dc480aac SHA-256: 6345025f5612387a0f85c73ad1855bd929d97f8983b38288abc279557861c3bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=python+3.+7+3+32+bit
    • http://files.tnecmn.com/uploads/1/3/1/0/131070539/2937140.pdf
    • http://files.badgerbuildingmover.com/uploads/1/3/1/4/131437378/001fc9bd358ea9.pdf
    • http://files.grissomvb.net/uploads/1/3/1/4/131454556/fawiwaj.pdf
    • http://files.janeantonovich.com/uploads/1/3/0/7/130775659/0a085b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/2016_ford_escape_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/bumupefime.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/bozofixaseru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/74179585299.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/favus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/79776883495.pdf
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/45814167343.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/sigisanepigowizugofebuvis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/72863707801.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/vezovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/karni_padi_badmashi_ringtone.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_off0000fb75.bin
5efd302a8ad02036a6e0afc6f93b433e8693bf9a21152336c325b99f672d488e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 4908 bytes
font_01_sfnt_off00010c40.bin
bd941e593b029831730101f6212c4171e18ed0f12623e99cc5ba503a3676ef04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 15432 bytes

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