Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e2a250f7b39a0…

MALICIOUS

PDF

63.4 KB Created: 2020-08-31 08:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfdcf34fd76a70c0278aa3b43c1e4d03 SHA-1: 84856099a0eb221eeafc5979b0a163229f74483c SHA-256: 097e2a250f7b39a0830efd35ea564bce06ee95c53b20837fd864814918840c80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, 26 of which point to PDF files hosted on Shopify. One of these links, however, directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=we+never+learn+fumino
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/51564655677.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/36726096286.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/fagadonofaverolex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/xujezuzegaxexetugowom.pdf
    • https://static.usrfiles.com/ugd/e32576_0c1921448b8e470dab0cf91c0f6eca29.pdf
    • https://static.usrfiles.com/ugd/82e28d_622ecf4f85f5437fa51ed458d76b40b4.pdf
    • https://static.usrfiles.com/ugd/de3d83_14158472ee2f4e03b894ee2062b6030e.pdf
    • https://static.usrfiles.com/ugd/1cfe37_73b88d4359024c77bac6c20c567a8c9d.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/menalitufip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/sad_lenny_face.pdf
    • https://cdn.shopify.com/s/files/1/0433/9662/8641/files/gogedakededuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/foreravulifaxobaretixasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6697/files/rental_agreement_forms_florida.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070aa.bin
538129548cc23e1ecd34c82dad3dd1ed006662b2e61fc810dff456e331939004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AA 19444 bytes
font_01_sfnt_off0000af2e.bin
14772ecd162f95e0f8a3a16a4df598bae6ef6617e6f75845c1343c3f99c95947		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2E 4612 bytes
font_02_sfnt_off0000bec7.bin
0d26c77ac18f2047f1891fd9587477d3933e25160bc0798fbc81729da3b4b15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC7 10456 bytes
font_03_sfnt_off0000e272.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 4324 bytes

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