Malicious PDF — malware analysis report

Static analysis result for SHA-256 8305834b9b9a7dd3…

MALICIOUS

PDF

37.8 KB Created: 2020-08-14 22:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f679d55aa3182ed411322057b245c8f9 SHA-1: 47c506bd13cc587124d649c13767a58ba9a060d9 SHA-256: 8305834b9b9a7dd361f39ee9df897a4395a00772d2a11467b726a83e62a88d4c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bereavement+2010+full+movie
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • http://files.mvhsmajorslibrary.com/uploads/1/3/1/4/131407877/4a2ac803983.pdf
    • http://kiwesik.fingerpoppinsoul.amsterdam/uploads/1/3/1/4/131407552/5399077.pdf
    • http://files.seaepiscopal.org/uploads/1/3/2/6/132682386/birivejarileja_futuwulirupu_vewizodududopaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/16477070442.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/bigusofanuzerogofusiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/desalaruruvitaban.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/88754256513.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/mofekutivateba.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/18156090594.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61053474184.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/kimuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/bekotifuxewabewa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/93280212876.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/15065379332.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/pediatric_bp_chart.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_off00005570.bin
816aaca9bae36c7186387519a23285bfc8636dee2bdf1d1e3ae7c5fc8dadf9c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5570 5168 bytes
font_01_sfnt_off000066ff.bin
2cb692104930d769ebfe8c2a817bd43311f2a4d94a3495277af83c43c0dc59c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FF 10364 bytes

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