Malicious PDF — malware analysis report

Static analysis result for SHA-256 172ff93e3b583960…

MALICIOUS

PDF

55.1 KB Created: 2020-08-22 22:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 588c4d38794b10c9aec73d20aabc4b1b SHA-1: 460e66eea038ddbd10e25de0fcfb9920b1623aff SHA-256: 172ff93e3b5839609d33b19642fc50cccd0688ab403a5a29d9341d7fee07dec2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known to host malicious content. The document body and embedded links suggest a lure for pirated movie content, a common tactic for distributing malware. The ML classifier strongly indicates maliciousness, and the PDF structure itself is flagged for containing a large number of external links, likely for SEO manipulation or to obscure malicious destinations.

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=aparichit+2+movie+hd
    • http://files.measurev-mcag.com/uploads/1/3/0/8/130814967/busurazurej_dasuradiguwuzek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3904/7336/files/posupezidiwebafuvex.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/40072025186.pdf
    • https://cdn.shopify.com/s/files/1/0428/7345/4748/files/xonugomimajomevakopozozo.pdf
    • https://cdn.shopify.com/s/files/1/0459/7710/8647/files/ielts_result_sheet_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/adobe_reader_converter_free_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/banking_preparation_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/amapiano_songs_waploaded.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/vavaxegujuxenepepatav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9192/files/titin_full_name.pdf
    • https://cdn.shopify.com/s/files/1/0436/1404/4323/files/xozugunugulubiwofewosug.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/harmony_hall_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/50316408505.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/25537453768.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000776d.bin
94ddf9297be00adf7c61d94cfb122c2d23acf28690fcea6d167a3f1416331624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776D 4968 bytes
font_01_sfnt_off0000884b.bin
a90aac179a9fc4f93c71c7d8e30976cde105b1deeace7214d8a49f2e3faba1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 10504 bytes
font_02_sfnt_off0000ac91.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC91 16092 bytes
font_03_sfnt_off0000c159.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 4324 bytes

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