Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da27c53281fcf8a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-03 09:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa3b7dcb79b1fa3bbfb92c4c444cc698 SHA-1: 88e1390275386e9c5af3a634845797d9618c61f0 SHA-256: 3da27c53281fcf8a2f61a3b17db136045f9b3dca1090be47351120d81df39572
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, many of which point to a link farm designed to obscure the final destination. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=zales+ring+size+chart+pdf. The document body contains garbled text but includes the same URL, suggesting it is the primary lure. The presence of numerous benign-looking Shopify links alongside the malicious redirector indicates a sophisticated attempt to blend in while directing users to a harmful site.

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=zales+ring+size+chart+pdf
    • http://files.footballsnapbacks.com/uploads/1/3/1/8/131872070/1788450.pdf
    • http://xisipavun.norikohanamassageacademy.com/uploads/1/3/1/3/131379312/falosol_nojisijibime_davoliza_jeris.pdf
    • http://files.juneauflukes.org/uploads/1/3/1/3/131383821/giwutosulaf_mufiga_sumuwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/doduzulasuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/zuwavenitezaseroxisa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/58130655156.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/53591880434.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/82001705647.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/corsair_headset_software.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/47109120230.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/birivota.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/jilojufakabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/puxekufetadilifagotubavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/google_sheets_find_and_replace.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0c.bin
b604374cea8ea44ebb7c336dce3bf80f7bad616a814351df369c03c1bb59fdb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 5104 bytes
font_01_sfnt_off00007b5f.bin
e6854dae77c21b677ef9e8f97a31b361e2f27bcfdf48c067360ce986e89ca076
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 9824 bytes
font_02_sfnt_off00009cf2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF2 4324 bytes