Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a54be36eb9afc3…

MALICIOUS

PDF

44.8 KB Created: 2020-08-01 12:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36073f9711f290a43f5d51d5b0fefc9 SHA-1: c34ec50dce05566dfd5a4a8ef56f46960d2dc385 SHA-256: 44a54be36eb9afc3464587fb661947186762b62392fbf13fd8b3b1292a54ad7f
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=char+in+c`. This suggests the document is designed to lure users to malicious websites, likely for further exploitation or credential harvesting. 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=char+in+c
    • http://files.runforthefallennh.com/uploads/1/3/1/6/131606789/mabiwoxeregofajuxew.pdf
    • http://files.scotty-elmslie.com/uploads/1/3/0/8/130814960/sedegokenam-tibitike.pdf
    • http://files.thetepeetribe.com/uploads/1/3/2/3/132303082/f38fe7b11.pdf
    • http://files.laurablatterman.com/uploads/1/3/1/3/131379740/9212042.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/bivugoriwet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/92942010623.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/wematuru.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/42856149799.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/62564423433.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/zilanolumulewif.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/43313068119.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/30345866591.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/lobepolegifalur.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1909/files/78929603443.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/66339297264.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_off00006885.bin
8393c4445e989f78e41499bd160eef432f4dcf090775a148eb72871af69ce51a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 4580 bytes
font_01_sfnt_off0000780e.bin
5b3b6c437f0688252bb58a43946b583dc5c8b08c8291a83853b4fba56355b6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 14828 bytes

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