Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4588badf5b6286…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 09:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d46838d24ca90c018ed91c33cdb6ab SHA-1: df3859cff58713c43b12e81578fbf8617e8e58c0 SHA-256: fa4588badf5b6286106845182e571ca69219168106352388e46eebb71a71f01b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, constituting a link farm. One of these links, 'https://ttraff.com/pify?keyword=illustrated+guide+to+the+national+el', is identified as a known malicious redirector. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to obscure the malicious destination or to leverage SEO tactics for distribution. No scripts were extracted, and the document body was heavily obfuscated.

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=illustrated+guide+to+the+national+el
    • http://files.thornebrookgallery.com/uploads/1/3/1/4/131406049/1301210.pdf
    • http://files.zenergieconseil.com/uploads/1/3/1/1/131164372/7605645.pdf
    • http://vagurawu.dianedailydose.com/uploads/1/3/1/0/131071258/e2bb8df.pdf
    • http://files.ashlandholyfamilyhighschool.com/uploads/1/3/1/4/131453950/4358268.pdf
    • http://files.feralcatrecoverycentre.com/uploads/1/3/1/3/131398385/jadopix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/8467660630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9452/4579/files/metabolic_approach_to_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/telkom_indonesia_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/tarolimazoduxisen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/zemejuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/pelomok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/life_and_death_read_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/xolofibunixigozolinu.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/chrome_manager_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/59296834292.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/binalubenozijuse.pdf
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/java_hash_table_example.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/16122040134.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/50301924635.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_off000054ad.bin
aa0fdc5ecc59676b7dedf419f8a76fd9ef8fe15f41c37e2b7d120194be0b393a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AD 4908 bytes
font_01_sfnt_off0000653c.bin
f42f2452187cbd9ac8700bbc018b47fd4b8084fb4c76c93ec9c850d519194fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653C 9812 bytes
font_02_sfnt_off000086be.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BE 4324 bytes

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