Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1eff28182c3ed06…

MALICIOUS

PDF

63.2 KB Created: 2020-08-30 18:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c459c181041764be865f378f71092f02 SHA-1: ceb61811cba77a778c31047b4001b3cd1a53fd93 SHA-256: f1eff28182c3ed06e516c92df4b1d68836472d5d3222ee8660410c43d67bbd55
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/wix?keyword=francisco+pizarro+letters', is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. The ML classifier also flagged this PDF with high confidence.

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.cc/wix?keyword=francisco+pizarro+letters
    • https://static.usrfiles.com/ugd/a18aa6_d9e6a7c286c0484e820e8472cb099f76.pdf
    • https://static.usrfiles.com/ugd/c1615c_74bfaaaa0fd348aeb04e444590659301.pdf
    • https://static.usrfiles.com/ugd/7baf93_c9d8e531d43a4d078c23a938fec4c5d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3760a391cc2b4da189a954bec98d68ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_363c9afafdc34a44a13dc7e47a33af43.pdf
    • https://static.usrfiles.com/ugd/accd1f_c55e1de80f614867818af420c46af014.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/lizowebam.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/dtu_b_tech_application_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/44191969017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7887/7337/files/fedenelawa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/pusutimimikiriveru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/54217499274.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/62062406057.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/vasigusurunujew.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_off0000ba31.bin
7c264fba3a6f6dddd432d61948a1c6de4c42850ba14ec311a1135ce4735c30b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA31 4932 bytes
font_01_sfnt_off0000cb07.bin
66d9d7781533683e1df3df852aac0e13444b30da6f2b6c2344a61b7e0fe23c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 10932 bytes

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