Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc655167ce782ef0…

MALICIOUS

PDF

67.4 KB Created: 2020-08-21 10:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f5c6aa77ea8a1f9d78ef278d0ef64d8 SHA-1: 8652c0b615d7ce80390eccb0cdd3285507dba5f9 SHA-256: cc655167ce782ef00de79c8d3a1a3bc525f683adbcbe181c72f0e1d8de625328
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the target URL 'https://ttraff.com/pify?keyword=aashiqui+2+song+all+ming'. This suggests a phishing or scam attempt leveraging SEO manipulation and redirector chains to deliver a payload or lead users to malicious 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=aashiqui+2+song+all+ming
    • http://vuguloj.learnarmenianonline.com/uploads/1/3/0/7/130738755/genikurom-zadalaxikidiji-vinigi-lododorupofos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5560/files/nofaxevivipatufipasap.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/security_risk_assessment_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/application_form_nsfas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/xoximalebuzeza.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/33480722157.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/annotating_a_book_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/the_inheritors_william_golding.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/online_graphing_calculator_ti_84_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/fahrenheit_to_celsius_conversion_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/11036644334.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/amelia_bedelia_original.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c120.bin
22b6cf259b76c0e3b792b26ebd9895e35e967896b9e0324735144103280c5c65
pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 5252 bytes
font_01_sfnt_off0000d2d2.bin
dd40d687a9b6a12c3e9cfecdeedc0243f559a2ab14313e6007c49c00270e5aab
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 14972 bytes