Malicious PDF — malware analysis report

Static analysis result for SHA-256 de94e1f7d929f396…

MALICIOUS

PDF

40.0 KB Created: 2020-08-03 06:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013f58ceb5c2e820e36beeccbbbf1000 SHA-1: 876c71229f596eabf93612e061739e459e7a9ccb SHA-256: de94e1f7d929f396e6d2b96fad34062aaa8268678985bc4667a54183b48ee558
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=ping+g20+driver+reviews'. It also contains a large number of embedded links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure malicious destinations. The document body, though heavily obfuscated, contains the same keywords as the malicious URL, suggesting a lure. 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=ping+g20+driver+reviews
    • http://files.coloradowheatens.com/uploads/1/3/2/6/132681992/janag-jitajebizez-xewezolego.pdf
    • http://files.darkpeninsulapress.com/uploads/1/3/0/7/130775750/49b44.pdf
    • http://files.artspacenj.org/uploads/1/3/2/8/132815015/gibutobojaduzi_kexid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/zebetabevawanod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/51179079402.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/34614708717.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/funudewibogogozusudaxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/vopudoviz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/67390294684.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/zabodejijeduxufetotuvoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/60073776401.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/wopugizujiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/fipulipijeboribug.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_off0000600f.bin
2efeac929064de9f5e6a69694720238bddb8f0b7bce6937772294f60c0132fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5180 bytes
font_01_sfnt_off000071db.bin
1ca74c5894cda26183f1773cd689b3c466d8744514b90e7b85ae9868c8af7b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 9856 bytes

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