Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3eaec4ad3ebf9b…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 10:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 869642371638531610b8bcb1d69423f5 SHA-1: 568b65fc93849c59086d127a6301b3598a312d45 SHA-256: 0c3eaec4ad3ebf9b42a46330f2da24cefd6d44a0f650baaca2b904be34ef16eb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.com/pify?keyword=jcb+3dx+specification+pdf
    • http://files.dj-b-fore.com/uploads/1/3/0/7/130739269/0d59f096583e.pdf
    • http://biwatugu.randolphgardenclub.org/uploads/1/3/1/6/131637016/sinemi-povixijetabef-tifajo-lixujodeja.pdf
    • http://files.hairbymandybrothers.com/uploads/1/3/1/0/131070866/7811973.pdf
    • http://files.handymantoledoohio.com/uploads/1/3/0/7/130740165/70b5ee26b54dc3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/27192426652.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/53788135860.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/82194372591.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/15515442633.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/irritable_bowel_syndrome_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/about_myself_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/83345874125.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/24024152132.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/joguxuxafudar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/fevanipinipeda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/26540573719.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_off00004b3f.bin
cb64c218a85bdd873a8c7e3e23c3f174f5a8bb4c1b6f6f3ffb408e4a0423fc39
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3F 5380 bytes
font_01_sfnt_off00005d9f.bin
c82c1762bfd1ddcdff53ed1deb47b775c0089e2ae1d962d7524bcade3adb0617
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 9804 bytes