Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c352fe5469996f…

MALICIOUS

PDF

50.0 KB Created: 2020-08-29 18:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31d29faa9b7500667ba784f46dd0c69 SHA-1: 01dd35f83ad4b97f0c3790fc73fa5f1f2923f7ea SHA-256: 48c352fe5469996fae07f1e8a5e2f5f50578afd944d25aeb31aa1ff4c3d0cc59
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body is heavily obfuscated but appears to contain references to the redirector URL and other benign-looking PDF files hosted on Shopify. The presence of a malicious redirector and a mass link farm suggests a phishing or SEO spam campaign.

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/wix?keyword=manual+unicenta+opos
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/textile_definitions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/arduino_programming_ide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/mimabo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/66634483984.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/78119407667.pdf
    • https://static.usrfiles.com/ugd/eda9ba_c1a1b2147b2a44029173eaaa3d6aaadb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/80945207158.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/wadirapogaki.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/dojutased.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4119/files/om_namah_shivaya_bob_marley_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/39996500769.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/ielts_on_track_academic_reading_test_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/47315798922.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/bujapugileladi.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_off00008631.bin
665aeb88b06d898aef37baac0ce3bcdb7ecc108d6d192735dbabd29564d8710a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8631 4836 bytes
font_01_sfnt_off000096b5.bin
cdb18b262701ca4f04760f3953f6796833ed091841a18d2346badc30e4931164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B5 10896 bytes

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