Malicious PDF — malware analysis report

Static analysis result for SHA-256 3433ed3910e47158…

MALICIOUS

PDF

32.5 KB Created: 2020-08-02 06:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f57ffe1d35a68bd029587f7c66843efc SHA-1: e954eeea810a64add0ad3211dd546d8a48aa6bb2 SHA-256: 3433ed3910e47158e0857e01ca31270002b525a51e78e1a11af5bce5e530b141
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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=maryland+stormwater+design+manual
    • http://files.dkgalphalambda.com/uploads/1/3/1/6/131637316/jubakifi.pdf
    • http://files.florablackettdesigns.com/uploads/1/3/1/0/131070692/b2a1bf87b3511.pdf
    • http://files.heistawards.com/uploads/1/3/2/6/132681992/5b8ccd48115.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/893878584.pdf
    • https://cdn.shopify.com/s/files/1/0432/0739/3435/files/32615567325.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/jisizokeworafagumapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/xutiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/89432576657.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/makemupi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/buroxakupeparolem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/89038981573.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/20589963521.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/the_decider_after_dark.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/kapetabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1259/files/62922271270.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/quicken_2015_manual.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_off0000441e.bin
2ab36b95af62e853b3dca22ce307cdb59765be9eeacb58359f137a53a1667f8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x441E 5344 bytes
font_01_sfnt_off00005655.bin
423d669e7755d4a305e339fb285f687072460854d2828ef2e4f3a1075354bcdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5655 9080 bytes