Malicious PDF — malware analysis report

Static analysis result for SHA-256 5863a4a80ab620b0…

MALICIOUS

PDF

38.8 KB Created: 2020-08-03 02:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c706d9a09eb168351eeef5d5971a9fd5 SHA-1: da32cfbb4a8b1efdc7e10f1980ef314c976b8066 SHA-256: 5863a4a80ab620b053082ed3b5e3308705e317bafb287d4e44325e8109f8cc3d
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of links and the presence of a redirector are strong indicators of a malicious 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=yum+list+installed
    • http://files.nicholasvetricopywriter.com/uploads/1/3/0/7/130775129/seson-jedoxe.pdf
    • http://files.remiesordi.com/uploads/1/3/1/3/131383456/6ade2f389a624e5.pdf
    • http://files.momedeirosart.com/uploads/1/3/0/7/130740142/2e2e28907d.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/9065175342.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/gokizakageseguzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/vesajodalanov.pdf
    • https://cdn.shopify.com/s/files/1/0435/9005/8152/files/53597219247.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/35199565952.pdf
    • https://cdn.shopify.com/s/files/1/0440/5778/8568/files/xozufeponumokoviwinos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/5422103891.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/nepadizef.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2530/files/74969657560.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/28573375167.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/gigezotitase.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_off000059fd.bin
b028dc23aa048d3c5340c36d713b775a8412c1bf7e4c49c0824dd6c4ffe08bce
pdf-font-stream PDF embedded font (sfnt) at offset 0x59FD 4836 bytes
font_01_sfnt_off00006a59.bin
70cd673990d7e6e9e6e6fb4efb32d5b1f2519ee5fc8c5ac8edb3f5d936b40dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 10628 bytes