Malicious PDF — malware analysis report

Static analysis result for SHA-256 983a1a0c0c111ee4…

MALICIOUS

PDF

40.3 KB Created: 2020-08-23 00:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d0c255c48acaccc619902246ef3daa SHA-1: df67112600459659c81d099dc0582857ddc7144f SHA-256: 983a1a0c0c111ee4842a9682c2c4459fad16267839dad5d88aea7984667d67d0
150 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=android+accessibility+settings+turn+off'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded document text, though partially corrupted, also contains the malicious URL, suggesting a lure to download or interact with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=android+accessibility+settings+turn+off
    • http://bosed.icchebuet.com/uploads/1/3/0/9/130969356/mojule_zinivatil.pdf
    • http://files.azprint115.com/uploads/1/3/2/7/132740723/tuxusasuluwagek_kuxiwatad_jegowuterijifid_ratidaravez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/the_blue_planet_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/gender_bias_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/nedokuxafobebotosufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/matebugaguwezunakajofaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/vunuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/jalimofewovitol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/varuberufemixefupebetam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/niripisudavuvajoxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/american_dragon_jake_long_cast.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006051.bin
32a16a89b451ede66b3e11093bbb37f0c814e0936f3f53324ead6419dd5e5f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6051 5420 bytes
font_01_sfnt_off000072ce.bin
3218b1d062c4b6258c5262f362e453b10f50a4a0b68a86ca96a27bb2ce6473fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 9908 bytes

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