Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d7038942ec2ca7…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 15:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c0fa14873df058af0efa7182d4db76 SHA-1: 340d1d7f69e896526382c14664c5f5f786513273 SHA-256: 86d7038942ec2ca7441b5ecb49c5df4f80363111598711c8074a76869e00b615
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDFs, likely as part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is designed to lead users to malicious content. 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.com/wix?keyword=ubiquiti+rocket+m5+default+ip+address
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/xonojevipofanigubamodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/nuwitetemalidebivor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/towegemi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/24280117612.pdf
    • https://cdn.shopify.com/s/files/1/0462/4347/9701/files/7991445640.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/behringer_x-_touch_editor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/35195835774.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/71580402742.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/pivexet.pdf
    • https://cdn.shopify.com/s/files/1/0460/0001/3479/files/joxanizug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/veterinary_microbiology_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_fda10cddaff840628864dae0117e75c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b94b05d034940d8877c2d6facf28444.pdf
    • https://static.usrfiles.com/ugd/9d869b_fc99b23cba314da78e91802558b3005e.pdf
    • https://static.usrfiles.com/ugd/8cbfce_360cfc697f3d4efdb3ca360b795e7890.pdf
    • https://static.usrfiles.com/ugd/f84671_6e384f83d0bf47e0b7f89262f0a4f551.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a4.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 6440 bytes
font_01_sfnt_off00007098.bin
bdd1f5fecba6cdfc0480917ef39e6fc4a8580b1266dc155d29e757a68c97a94d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7098 5744 bytes
font_02_sfnt_off0000840e.bin
92b604a1b150329ded556c304770ff348dad9bf4a5497dcf4c7b4659b4877fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840E 10860 bytes

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