Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cadc418e9453801…

MALICIOUS

PDF

47.0 KB Created: 2020-08-19 17:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20a861ba22bc5e4a24e0dde2b733d31c SHA-1: 2d842f40757a8a9a761dd1f004832561376f76bb SHA-256: 5cadc418e94538010dc3ad7376baddcfacf05df59f50d5c75253895b7402593e
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded URL `https://ttraff.cc/pify?keyword=gout+diet+sheet+bda` is a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, suggesting a lure to external content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence point to a malicious intent.

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=gout+diet+sheet+bda
    • http://files.rutherfordmemorialumc.com/uploads/1/3/2/3/132302855/walalebavepal.pdf
    • http://files.mtolivetofperry.org/uploads/1/3/2/6/132680808/81eda9.pdf
    • http://files.americaimproving.com/uploads/1/3/0/8/130814057/1678866.pdf
    • http://files.belmontpianoacademy.org/uploads/1/3/0/7/130775675/ninid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/duzusod.pdf
    • https://cdn.shopify.com/s/files/1/0432/2462/9411/files/89218614627.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/labrinth_jealous_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/65576683235.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/belk_theater_at_blumenthal_performing_arts_center.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1448/files/62289824438.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/521331066.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/arduino_sensor_projects.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/free_illustrator_templates_for_infographics.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/14657243979.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/52768265605.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bbc.bin
bf85547af95e73f41fadd5033b73a67770396baeb19be389e5a5a59744e3366d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 4732 bytes
font_01_sfnt_off00007be0.bin
8211fd03012eb56c8f98ddf6aac25c0ec59a40fb21aa822f14f8b0a7d3f005ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE0 11084 bytes
font_02_sfnt_off0000a13f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13F 4324 bytes

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