Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fb4feda23f9d32…

MALICIOUS

PDF

49.1 KB Created: 2020-08-02 23:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58833ace1d12e2091245a776c1576f9c SHA-1: 0dca39f8775df53c4720262ed9d58e65bdc8d9bd SHA-256: 01fb4feda23f9d325f05c980da33e9205a8dbc2d957b1f9c5c39a9ed2f749a1b
154 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'phpstorm activation code'. The document body, though partially corrupted, also contains this lure and numerous other links pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The presence of a malicious redirector link and the sheer volume of outbound links strongly indicate an attempt to lead the user to a malicious site.

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=phpstorm+acitvation+code
    • http://files.simeksfarm.com/uploads/1/3/1/4/131454766/a4cc6.pdf
    • http://files.naturebajuicebar.com/uploads/1/3/1/3/131398385/7bb9e069490f1.pdf
    • http://files.jillwarnearts.com/uploads/1/3/0/7/130776082/zonupagisakab_wojedevopur_lajaxokipa.pdf
    • http://files.pulsarevent.com/uploads/1/3/1/4/131408024/4632308.pdf
    • http://files.bopmusicschool.org.nz/uploads/1/3/1/4/131437172/9664d77cde.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/wudajupopogot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/kexedewosebemolok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/vemojagoxunevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/8546072997.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/wopimilenekaxepojem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/57151528923.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/vonefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/liregaxifadikebe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/53316115365.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/63915169063.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/52700611737.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/11240714882.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/80134972724.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
stream_003_off00006345.bin
22f9358c27d8bf48ecccacf9af0de4f3286b5d1d3c7510308c9c7ebdc9a5b21b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6345 9552 bytes
font_01_sfnt_off000082af.bin
1d63d79b5e3d085e18df40566811738581292992e5b5e4d77a9e197980f4641a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AF 5340 bytes
font_02_sfnt_off000094b1.bin
b8b51de6cfd4f4af928e2288398009b696a4a2390d444bb56acfd7e92681896b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B1 10100 bytes

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