Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c92dc0b7242a9fd…

MALICIOUS

PDF

47.3 KB Created: 2020-08-02 23:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d394c107e85ac7a3088451cc69cbdfb7 SHA-1: 70ec61e27d0db1e44e16bef49c1badce865e9e7d SHA-256: 3c92dc0b7242a9fd719ebb6d2405a41f8d0a31534012fe82a0abe0ef5738036d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=diy+laptop+stand'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same redirect URL and references to 'wkhtmltopdf', suggesting it's a generated document designed to lure users to the malicious site.

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=diy+laptop+stand
    • http://files.krishyoga.com/uploads/1/3/0/8/130813301/guruwonisunugi.pdf
    • http://files.achskiwins.org/uploads/1/3/2/6/132681201/kisevulet.pdf
    • http://files.theplasticmeccanonut.com/uploads/1/3/1/0/131071063/dodogujilol_patujadu.pdf
    • http://files.thecoveatfoxhollow.com/uploads/1/3/2/6/132682882/954f62.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3221/files/zelodugosokomitenepirew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/werixolokiwidukizatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/74130270407.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/61207321439.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/55586301802.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/host_file_in_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/mipek.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/natajurarizefade.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/36537569630.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/90950835585.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/18920073420.pdf
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/84317730734.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_off00007ac4.bin
6e26aeb3f86fba6c73aa06aabd1f805c1f4a617134774e54a8fb134334cc3867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC4 4960 bytes
font_01_sfnt_off00008bc5.bin
ee62af86008c643042f8d075fc49de5fa5be53d794377677934341876e5978e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC5 10816 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.