Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59a52d2d945b628…

MALICIOUS

PDF

46.7 KB Created: 2020-08-14 07:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34dfe9ebd9bb143e37298b00a580732d SHA-1: 70c2de0a9ac2bd0a31d1e201933a007f97f12b8a SHA-256: a59a52d2d945b62850a4ebfe6e510bf9ceb03b40d179a2f2b31c3983f2da0926
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=lightning+strike+app+android'. Additionally, it features a PDF link farm, with the primary link leading to a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and keywords related to an app, suggesting a phishing or scam attempt.

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=lightning+strike+app+android
    • http://tavudibek.immanuel-on-the-hill.org/uploads/1/3/0/8/130813528/d9f5f2567b90.pdf
    • http://zuvudato.homeopathhealer.com/uploads/1/3/1/4/131483281/miduwozaduti_dojupe.pdf
    • http://kovidir.newageofheroes.com/uploads/1/3/1/6/131606577/jobetosux.pdf
    • http://files.ugaswimanddiveclub.com/uploads/1/3/2/7/132740462/bexuwexibarep-balozevolas-mivovimodafo-gulanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/9736872123.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/76185730438.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/bunofugafunenezamumeti.pdf
    • https://cdn.shopify.com/s/files/1/0434/6531/0374/files/printable_adirondack_chair_plans.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/23531124648.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/gowuxitajeno.pdf
    • https://cdn.shopify.com/s/files/1/0450/8824/3864/files/maniac_magee_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/83488216220.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/nys_dmv_motorcycle_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/72461951145.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/xufumugedewomepelidatof.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/32697182329.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/munudafiwawolaxufanutow.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_off00006b92.bin
affb4548e55733effe99c596a3227eaf1effbbdcaec8103401364e3f8328bfcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 4984 bytes
font_01_sfnt_off00007c78.bin
d720e7d081d75be069d32884bfbefc215759b342a73a56399d3e89f5aec5eaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C78 10244 bytes
font_02_sfnt_off00009f85.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F85 4324 bytes

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