Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ef991dbdecde6c…

MALICIOUS

PDF

85.7 KB Created: 2020-08-08 22:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcced13e80faceebe1b806d4f756a4e2 SHA-1: ed6a08dd8017e5b3b0c9b35714aa58fbcf3068fb SHA-256: 15ef991dbdecde6c0713bda3ad3466b08326b12e5713cca24b39c32c427a1d84
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of a link farm. One prominent URL, 'https://ttraff.cc/pify?keyword=dowry+harassment+act+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of a malicious redirector and a large number of external links indicates a high likelihood of a phishing or malware distribution attempt.

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/pify?keyword=dowry+harassment+act+pdf
    • http://files.mrtoole.com/uploads/1/3/1/4/131438011/921712.pdf
    • http://files.giaddiecreations.com/uploads/1/3/1/1/131164081/2b8a1f70a463.pdf
    • http://files.biozapplabs.com/uploads/1/3/1/1/131164052/4052766.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/41903662534.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/76844156083.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/lofopexikepasivitix.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/basic_principles_of_biblical_counseling.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/zezaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/dinetoxelisema.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/bijerogigato.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/67569606699.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/sisowimib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/feduxese.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/adobe_pdf_converter_free_download_for_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/vizio_m70_c3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/89654686419.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/15109382292.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5f.bin
3a14239f5617a80c44efb601ba3694535ba39ac7c730fc4dd4cc91e23c69dcce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 3724 bytes
font_01_sfnt_off0000fca5.bin
a6e3832a4305efcc3a3dbbbbdf3d4629d0a2f69ec3b2617f56e3f6e7ceac8613		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 5556 bytes
font_02_sfnt_off00010f7d.bin
012a89b5c6a2cbc42d3039b50d64e0c6f6ab47f3e54a0a04f51fdd333e1ce40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7D 10488 bytes
font_03_sfnt_off0001339a.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1339A 16164 bytes

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