Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f1cd5efa5e4c35…

MALICIOUS

PDF

43.0 KB Created: 2020-08-12 12:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c60127917ff718a43ff3ae5bbc7c419 SHA-1: 0ea4e33b39ea2e9a8a9b9880396124f2d2a8c0e1 SHA-256: d6f1cd5efa5e4c35862db8edc1daf0bb018898787c71680a56018f1fd5e8e3c2
150 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=advt+12+2020+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm or SEO poisoning technique. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=advt+12+2020+pdf
    • http://riweboj.yauponberrypress.com/uploads/1/3/1/0/131070872/soneki.pdf
    • http://files.creatrixuk.com/uploads/1/3/2/7/132740619/4de2222c35873db.pdf
    • http://files.midwestproductionrestoration.com/uploads/1/3/1/1/131164425/4d8ff.pdf
    • http://files.outruntherays.org/uploads/1/3/2/6/132682655/4d6f9089b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/jisenebowudap.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/gagokusimagisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/toxilepawuwukus.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/circuito_integrado_cd4017.pdf
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/ligalodedofakevozupom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2245/files/54639645821.pdf
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/biryani_recipe_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0098/6787/files/angina_pektoris_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/77031423689.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/zinivozanugimatufomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/grief_and_loss_support_group_facilitator_s_manual.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_off00006d1b.bin
7dc5c838880f009774bf4d91e99595294ec7669ac47e444b65f63cfadd3e32a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 4892 bytes
font_01_sfnt_off00007dec.bin
211e2b9e1d9ca64ea6b4ba32c85c53ecd47ae6e547a05b13eafaa404d61b6912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 9656 bytes

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