Malicious PDF — malware analysis report

Static analysis result for SHA-256 c314037825d4e4d9…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 19:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0067619b5ca32951b1a41812e64079f0 SHA-1: 018a04dcb52f2829b1c6e4552a9ecb83db3024a2 SHA-256: c314037825d4e4d99c7ea208e85b47f974e15253604b75379fd32cc8f0f37313
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in a lure related to Instagram. The document also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic generation. No scripts were extracted, but the presence of a malicious redirector and the nature of the embedded links indicate a phishing or redirection attempt.

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=instagram++pc+chrome
    • http://gixejofob.carlisleherbalstuff.com/uploads/1/3/1/4/131483281/162173c7444a.pdf
    • http://vexir.stephengatt.com/uploads/1/3/1/3/131398020/3d30f55d71.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/microxp-_0._82._iso.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/8185932524.pdf
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/affective_neuroscience_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/sudep.pdf
    • https://cdn.shopify.com/s/files/1/0436/5742/9145/files/14637921222.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/wedufizovifarege.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/holt_mcdougal_larson_algebra_2_common_core_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/cheap_android_cell_phones_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/wenavumorudukujipe.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_off00006168.bin
0ff30c380230ff15dcb06476c9e17180b2103a793abfa928d3748a6552405dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 5252 bytes
font_01_sfnt_off0000730d.bin
f4ac079d9723a32b2fd3d63b46dda81669bca137c9bc860bb5a47296a9ef0934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 10372 bytes

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