Malicious PDF — malware analysis report

Static analysis result for SHA-256 3697cc32f589dd74…

MALICIOUS

PDF

80.8 KB Created: 2020-08-11 18:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af962e5dfca878e3a9c8656eb372fef SHA-1: 29a9ae79451868b45122b4865bf268ec218ee145 SHA-256: 3697cc32f589dd7432937438a1d6503c869ddec9554257d011a5f0e0deb7c752
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily corrupted, contains the URL https://ttraff.cc/pify?keyword=equilibrium+points+in+n+person+games+nash+pdf, suggesting a lure to a malicious site disguised as an academic paper. No scripts were extracted from this sample.

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=equilibrium+points+in+n+person+games+nash+pdf
    • http://files.creategoodliving.com/uploads/1/3/1/0/131071243/motozap_juseri_sobib.pdf
    • http://files.jonnystills.com/uploads/1/3/1/4/131438216/fazesizeki_bumase_nepubagutisol_xisapesavujur.pdf
    • http://files.marnacurrie.com/uploads/1/3/1/4/131482821/4128178.pdf
    • http://rozedon.sustainablerecovery.net/uploads/1/3/1/4/131407406/600719.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/28202414393.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/vazofuferuxaxuxikasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/kejexem.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/44561846184.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/36330736088.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/notokigixezizirixafilegav.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/waxakakujakerotuketoxobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/dopelemor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/58412586862.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/majasufitomarejupafis.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/83998813507.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/51378227015.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e27e.bin
9e62c9d56dbe435eea58538ee3b75a3864bd50fcc62459f85609a074d3c98e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5680 bytes
font_01_sfnt_off0000f58d.bin
dc0e8552e6be6d233b98d29ee8c28b48adbaadd2c6af00a36557b86256a03cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 12768 bytes
font_02_sfnt_off00011f59.bin
cd3fe636be200fc36f4b3e772692918cbc9cd476db2786c17887c300409a6ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F59 16436 bytes

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