Malicious PDF — malware analysis report

Static analysis result for SHA-256 00aab98ca704dee9…

MALICIOUS

PDF

45.2 KB Created: 2020-08-01 15:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b272bc25c9150c038b28a311b072d9a SHA-1: 8c2e50d42fcfad04565f50dd79bc9207b41d27d7 SHA-256: 00aab98ca704dee926b3cb00cc78bd025f70d54e1df4a0676366e6466d42e723
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=dvd+x+copy'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to lure the user into clicking it. The ML classifier also strongly indicated maliciousness.

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=dvd+x+copy
    • http://files.hydro4covid.com/uploads/1/3/2/6/132696048/20630c07859f2b.pdf
    • http://files.quigleycomics.com/uploads/1/3/0/7/130775245/0d024a0.pdf
    • http://files.racheljeffery.com/uploads/1/3/0/8/130874359/ditixo_nebezo_besupewerepiwi.pdf
    • http://files.internationaltrisomyalliance.com/uploads/1/3/1/4/131453402/tamanojag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/81601308213.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/ruzirawofinazukudoreliz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/jewisivasiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/29719679207.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/49369297176.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/85498371907.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/49723056237.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/58233178615.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4904/files/78587694253.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/john_deere_lx279.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_off0000678e.bin
3941afd6e3cf20c6ec60830cf20e967cb3099b16cef3624aa1bdd9b22d91e968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678E 4216 bytes
font_01_sfnt_off000075e9.bin
b7cf970b73ad86bae0667510c03cf090205dba19bff6f8f47aa42bf90c364523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E9 10652 bytes
font_02_sfnt_off00009a53.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A53 4324 bytes

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