Malicious PDF — malware analysis report

Static analysis result for SHA-256 a242a76ba665c916…

MALICIOUS

PDF

49.7 KB Created: 2020-07-29 10:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49027510933a6a998b3d76086021c229 SHA-1: a3985342f6f333cca7c851b6d3c10d65eb5f9e4d SHA-256: a242a76ba665c9169de2d63f05f93c2fd365c3ef1f9d95ecf0004ef0dbfa0e6e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.ru/pify?keyword=johor+state+public+holiday+2020+pdf' leads to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, with 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf' being the first identified. The document body, though heavily obfuscated, contains text related to 'Johor state public holiday 2020 pdf', likely a lure to disguise the malicious intent.

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=johor+state+public+holiday+2020+pdf
    • http://files.chuckpisa.com/uploads/1/3/0/7/130739415/bosepa.pdf
    • http://files.spiritfireshaman.com/uploads/1/3/0/7/130739470/81eea3dfd.pdf
    • http://files.carnarvonraceclub.com/uploads/1/3/2/6/132695730/7497085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/mibedo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/vuveloxinikigogozepevumop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/dojuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/jamobedozaxavizolid.pdf
    • https://cdn.shopify.com/s/files/1/0436/9602/9864/files/xenofumotozom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/povilepofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/jazasugaraxodalupidenugab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/kafunagizifetawowidijal.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/92658018481.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/46592622885.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/71228471121.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_off0000838d.bin
1d60e7355676477e89429078e8a511bd30df5110a1245f7d845ff9692b9404e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 5524 bytes
font_01_sfnt_off0000966d.bin
9f11dbf426e4bece1e1c73c8d17ccb85c260ad8800576867f839193a6e5e1cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966D 10244 bytes

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