Malicious PDF — malware analysis report

Static analysis result for SHA-256 372af8b2a44f4171…

MALICIOUS

PDF

51.5 KB Created: 2020-08-13 23:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1b49b7ea1bf67c9961d48205ec31e7 SHA-1: 39bf77841d2084c6010fb848c705c29d9df6b185 SHA-256: 372af8b2a44f4171457693bbf0c31164c17dbcde66442a47125200bf2524a473
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a download for 'Cinema apk ad free 1.3.2'. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. 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=cinema+apk+ad+free+1.+3.+2
    • http://files.consumershipmarketing.com/uploads/1/3/1/6/131606111/6282030.pdf
    • http://files.koyltontownshipmi.org/uploads/1/3/1/3/131381602/jolidawobiwubom.pdf
    • http://files.sustainablewellesley.com/uploads/1/3/1/3/131398504/f9a7d.pdf
    • http://files.rmelectricsolutions.com/uploads/1/3/1/3/131381363/9906018.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/14000149915.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/jumejavaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0435/4569/0261/files/35978788305.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/56744873293.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/can_t_stop_red_hot_chili_peppers_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/mewevaxizib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7961/5142/files/honda_gx160_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0454/4217/1038/files/1691493570.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/wasepuxafulosajadopuvidi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075f8.bin
ef65e841b5beb836b307f1a90bdd5280b7a34d222d472b552278a26e6a59e813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5328 bytes
font_01_sfnt_off0000880c.bin
726d236f987eee15fd9caea7b9a4e2c81d262459fee81459152203671f27af96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 10464 bytes
font_02_sfnt_off0000ab9c.bin
bbf267bdf4ac853042b967417f4f5c1aa22afeb20001dc0c34f122ab84a6e6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9C 16116 bytes

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