Malicious PDF — malware analysis report

Static analysis result for SHA-256 033306f1d1151a97…

MALICIOUS

PDF

46.0 KB Created: 2020-08-19 12:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e9ae2b3f1b250f23c0299d9193ceadc SHA-1: fdc81c499e93f5e011a908498d267fcafe22f0ff SHA-256: 033306f1d1151a97fd9276db40884c47e33917324e301f9c1293220476fbf5d2
154 Risk Score

Malware Insights

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

This PDF document contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or scam attempt. The embedded URLs, including https://ttraff.ru/pify?keyword=bnf+pharmacy+book+free, are designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a link farm or redirection scheme.

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.ru/pify?keyword=bnf+pharmacy+book+free
    • http://files.fawkhamridingclub.com/uploads/1/3/0/8/130813645/sofavemobiruxe_poloso.pdf
    • http://files.organicbakies.com/uploads/1/3/0/9/130969632/rusot.pdf
    • http://files.mobiledetailingsandiego.com/uploads/1/3/2/3/132303123/nukadok.pdf
    • http://files.esandypowell.com/uploads/1/3/1/4/131406173/8844565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/animal_cell_structure_and_function_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/zalukeba.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/mullard_circuits_audio_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/kibejakonilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/free_simple_will_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/wufefozeboxufitu.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/47185882212.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/77527839837.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/97222369441.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/24261770423.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_off000068c1.bin
7784fa44ffa3716a01595c5a47ede93c741d729009e933597427a1848e843e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 5060 bytes
font_01_sfnt_off000079b2.bin
f7d5a27630c00040ae114d9473f1b47eba0ac1e1e363f05f713b5b55af1a5566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 10348 bytes
font_02_sfnt_off00009d0e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0E 4324 bytes

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