Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8be426d0944fe7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 03:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b459508b53a7d0dfafa38bb1ffb2283 SHA-1: d4a87eaaaa2283b5de621b1a3a07620cc2b38277 SHA-256: 4b8be426d0944fe7ca046ebdf32ecd6d1ad0d259db6722e44bb02df22d70a485
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a link to a known malicious redirector at ttraff.com, which is used to deliver the final payload. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to download further malicious content.

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=basic+electrical+engineering+questions+pdf
    • http://dibux.theconcertspot.com/uploads/1/3/2/7/132740494/virilidowawivajozo.pdf
    • http://files.veranijveld.com/uploads/1/3/0/8/130814232/fugixakewakunokol.pdf
    • http://files.handystansplumbing.com/uploads/1/3/0/8/130873728/6183284.pdf
    • http://files.encourage-fmhs.info/uploads/1/3/2/6/132683140/6447267e.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/66297173649.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/teoria_finalista_mitigada.pdf
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/pan_card_date_of_birth_affidavit_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/53332630063.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/70667012008.pdf
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/dosinuzikewomufez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/65195381169.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/difosefebev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/19870629420.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_off000073ee.bin
3a4b7628ae1062417980f748ee82d0ddc79f84ba99f88d8451656f1a2850ad75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5500 bytes
font_01_sfnt_off0000869b.bin
69894bf2be42b4bfc33313541943b4689316175288e05d610f45099f789e02e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 10692 bytes

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