Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd35844b38d104c1…

MALICIOUS

PDF

46.6 KB Created: 2020-07-26 03:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7e50976700384817e3d87be6511948d SHA-1: 49945272bf4378fcb1dfedd10e9cedf42ce5441f SHA-256: dd35844b38d104c1dbd631d9a84ba00f10b4af8f171f0af6cb0b68e03f9e2eac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=guided+reading+levels+for+parents
    • http://files.badgerwifi.com/uploads/1/3/1/3/131379290/wosasakinikejol-xiwur.pdf
    • http://files.australianprophecyschool.com/uploads/1/3/1/3/131398406/46bebaf8.pdf
    • http://files.umnnavs.org/uploads/1/3/1/4/131454883/sawuxerativuzud.pdf
    • http://files.premiergoldendoodles.net/uploads/1/3/0/8/130814126/gujow-wanim.pdf
    • http://files.simplifiedcomm.com/uploads/1/3/1/4/131437680/9977842.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/dufazekojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/19924741579.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/votiwovedodiwub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/wozekejugug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nujogopuju.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/72898950074.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/2815522177.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/63028951007.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/14456340688.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/sobivirifenujudovepaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/22413141969.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/
    • https://cdn.shopify.com/s/files/1/0429/1526/6

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000782c.bin
da05182852f946fa98459db68ca0ba831ef9604485145ba50ea89a182857c7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782C 5184 bytes
font_01_sfnt_off000089e4.bin
68539fce3c1b2a2745b6dec44fef048a58c14270552441e8d2e935da3b3d2e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 10156 bytes

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