Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafd2e90ea32e642…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 00:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4e63031006d40ecca20d3abbde53439 SHA-1: b2b4e9b14a53cdd4551bc678f10cd1e0028cc74e SHA-256: dafd2e90ea32e642d5bcb478a340e15d92de8ddffe762b564989de1bd82b5316
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector at 'ttraff.com' which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'impossible quiz answers'. The PDF also contains a large number of links to other PDFs hosted on shopify.com, likely part of a link farm to improve SEO for malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=impossible+quiz+answers+level+26
    • http://files.mycph.info/uploads/1/3/2/6/132683228/bidut.pdf
    • http://files.gogebicontonagonfap.com/uploads/1/3/1/8/131871462/riwidepevofasos.pdf
    • http://vovuvuxut.maxpotentialpitching.com/uploads/1/3/1/6/131606727/edd10cc.pdf
    • http://files.gcndesign.com/uploads/1/3/1/3/131398278/lakenumiti-xojalorawowugol.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/adobe_reader_9._5_offline.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/56640856685.pdf
    • https://cdn.shopify.com/s/files/1/0437/4501/8017/files/94356010391.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/danuno.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/96216859599.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/utilitarianism_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/bomelabisedifasuxuwapanug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/american_truck_simulator_mods_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/mojalefajepawamepopupewe.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b8.bin
0634b644a7a446a3cea3ba6f8ad2df8b7d6942189fb06e4a355d2d5e8040075d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 5656 bytes
font_01_sfnt_off000073f6.bin
f50205bf703a1aa4759fab214ba8b78b5336f651d0230c0a62e29cd28efcbcdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 10356 bytes

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