Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dfd7bd1734ea7f…

MALICIOUS

PDF

35.3 KB Created: 2020-08-08 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcc3aaf42a384c150caeb014872f6206 SHA-1: bab517d9a7a83230c21368c13b4b886d25ee34ed SHA-256: 00dfd7bd1734ea7fee83cc8b40a27c2805317b10175dbbfe10d7637113ef7946
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=waltz+in+e+minor+chopin+pdf'. Additionally, the PDF is flagged as a link farm, containing numerous external links, many of which are to Shopify, but some are to unknown domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to musical scores.

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=waltz+in+e+minor+chopin+pdf
    • http://zuraje.bertram-hill.com/uploads/1/3/0/8/130814328/6afe1cdd456d56.pdf
    • http://files.neveralone.blog/uploads/1/3/0/7/130739654/rezife.pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/disney_piano_sheet_music_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/zaxamarelalanefevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/download_jamb_biology_past_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3997/files/83233306553.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/76480256251.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/laputegenukajinif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/fuzeginasaxejogipeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/international_business_level_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/39169783900.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/18403740865.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/30125765425.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/59437604095.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ab.bin
6acbfb87a8b22a17580efd9b075c4149d168098e64a61e4f45fb99040e15c089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47AB 5280 bytes
font_01_sfnt_off0000598d.bin
a9166410d260218f19981d81554dc2a2042d3f9892e4e56cc26f3651a8dbd3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598D 12252 bytes

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