Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7e25b8d7651152…

MALICIOUS

PDF

44.0 KB Created: 2020-08-21 01:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b4541262c5e1a4f34aaec4acccde43 SHA-1: c5097c9e289806f37f0f4fa5084f0bd4038b7002 SHA-256: 1c7e25b8d765115236d5f69dbcc8e95ea4fad6c898828e540710270cf16e1917
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to lure users to click on what appears to be a legitimate PDF, but redirects to the malicious domain ttraff.com. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or redirection campaign.

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/pify?keyword=criminal+justice+reform+2019+new+york
    • http://files.fundacionchelaquintana.com/uploads/1/3/0/8/130874633/afc840b02aa.pdf
    • http://files.jennifercrowderartist.com/uploads/1/3/0/7/130776162/3411898.pdf
    • http://files.jimbruner.com/uploads/1/3/0/7/130776644/wupejerur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/3178371719.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/mogabebulugoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/winrar_64bit_win_10_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/93467283148.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/22529908554.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/pre_algebra_practice_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/jajixetoditelimusuxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/95047529314.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/30057883820.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_off00006d88.bin
f2e123323a3b453e1c9b427674997cc4e0c11b858e4a8a157ee7d36b83ec4c6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D88 5748 bytes
font_01_sfnt_off00008118.bin
422df3385e010234f8eef613b117cf1e983f2810547245a3e3dcf0bdd19c714a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 9968 bytes

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