Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d89ca2afd5290b…

MALICIOUS

PDF

90.5 KB Created: 2020-08-05 01:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bfba1a22bd0445bc39948164a6bc56 SHA-1: c3e48771ea6ea29286b87a521cba19a5241ec68a SHA-256: e6d89ca2afd5290bda9e4e3d89996d8bb104d7c35ed7d4bf943fae37490924ba
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=sample+email+for+sending+resume+pdf
    • http://files.lifesems.org/uploads/1/3/1/3/131379113/c8bbb.pdf
    • http://files.childrenscoalition.org/uploads/1/3/0/8/130815009/66bbc7448603.pdf
    • http://files.autorematch.com/uploads/1/3/1/3/131383842/1334479.pdf
    • http://xojelawi.nagreeconsulting.com/uploads/1/3/2/6/132681409/webuvupuzuva-gumajovamid.pdf
    • http://seliro.atlasandanchortattoo.com/uploads/1/3/1/4/131437044/fuwuvotaf_sawolajuzizizaf_puwoxulikonupu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/talubizavawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0871/1080/files/52576306996.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/33437881260.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/pdf_to_paint.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/tipozamuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7968/files/muxefoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/xexilototavewiwijenuka.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/clicker_heroes_latest_version_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/microsoft_office_enterprise_2007.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/95302641749.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/xulunanemojosex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/29862781798.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001185b.bin
92c3ffbf9d9c854bf51d369439730466986204f7310e13efaae323a78e9bcf62
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 5264 bytes
font_01_sfnt_off00012a1b.bin
d5f3556a97b8424926c90f4f047aae0210c472561a0f2026af2b1380afbe2d44
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1B 10588 bytes
font_02_sfnt_off00014e06.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E06 4324 bytes