Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e937a40dcbd433e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 07:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 047a134941b985ec1b25a4ad9a3bf32b SHA-1: 58670601978d58186344d1424869d1ee03837b40 SHA-256: 1e937a40dcbd433e4a0287ef5a5b29f035581d725040311cdb1d7b76ac6fb23d
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 external PDF files hosted on various domains, including a known malicious redirector. The document body, though partially corrupted, contains the title "Bassinet sheet tutorial" and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=bassinet+sheet+tutorial
    • http://files.procommtheatretroupe.com/uploads/1/3/0/7/130739684/xavin_buvanikerobudon_tokovuxexezugu.pdf
    • http://wulaxopa.classicact.net/uploads/1/3/1/0/131070374/568673.pdf
    • http://files.myvitalessentials.com/uploads/1/3/1/6/131637240/wapim_sipixolefoninam_funibokogej.pdf
    • http://pujulalo.akiineventos.com/uploads/1/3/0/9/130969204/lesixoxuzip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/gasezow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/united_state_address.pdf
    • https://cdn.shopify.com/s/files/1/0432/6257/4750/files/xenowofisuligamal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/26623492570.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/foratof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/wakewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/liwurilomoxaketida.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/94456557213.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_off00006f1e.bin
9afe0c6d745e19e23849bbafbb26d3c69dd561d04fe5eb51c42082dee4f0696b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 4820 bytes
font_01_sfnt_off00007f6e.bin
6f8d2ef21b94b2b856e99e859d3f1d787eee330cc8b1b0a1857bb0ba6bcb6a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 10192 bytes

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