Malicious PDF — malware analysis report

Static analysis result for SHA-256 70130bb8e11f1955…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 11:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d32b001b3b72385d9396f7df6fac085 SHA-1: ded71709188ffffaf258f9cb2a198ceb0593d11c SHA-256: 70130bb8e11f1955473929bbb12f2752c23a31ee6eebf287a4d6873eba6c56c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and redirects to malicious infrastructure, indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The embedded document body text, though obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=lures+or+lace+gender+reveal+invitation+template', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=lures+or+lace+gender+reveal+invitation+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://static.usrfiles.com/ugd/19ce5d_dd83d5e3f2d04aeea3b3d672461cae8d.pdf
    • https://static.usrfiles.com/ugd/277b62_35e264fdf035488fa08b5b49b0818bde.pdf
    • https://static.usrfiles.com/ugd/b8c837_75b268d92af6403a938c961f65388563.pdf
    • https://static.usrfiles.com/ugd/b8c837_de3c9db0f874497da0122ed0da29be62.pdf
    • https://static.usrfiles.com/ugd/e73fea_ca931e3741e842e6bd414c73400b2617.pdf
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/31055817747.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/zukojotidenifedutezok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/40809085078.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/xovoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/zozimi.pdf
    • https://cdn.shopify.com/s/files/1/0460/8399/7860/files/42580199606.pdf
    • https://static.usrfiles.com/ugd/10e3af_364a289dd8954f66bdc56cb6a50e7b85.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_1f7b11291dff43658b2c8b20c1a832ba.pdf
    • https://static.usrfiles.com/ugd/f0e51d_3b9606313c714ced80e5be9d843b051a.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d9a.bin
c708f986419556d639d23b7010354b65de1aebf19c8a81a76ab682db734bcc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9A 5396 bytes
font_01_sfnt_off00005fdd.bin
1eac94c7a5482b6e120c2135ba1b40e4b42ec5b22ebd14a0a78d712a4441ca21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 8268 bytes
font_02_sfnt_off0000767d.bin
2d36205a5efec2a107a3faeec78a0a96c176e242927c4983af85d66431a9a45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10208 bytes

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