Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b1ec398131d883…

MALICIOUS

PDF

39.9 KB Created: 2020-08-09 01:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62c0fe28127b64cc1125b5f45a58ba78 SHA-1: 8cb054ec86bc4294a0d9096229f7836f89210da4 SHA-256: 44b1ec398131d8838a7949847283f6b9e84120beb415127f0f0edf86d5d9f3de
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, indicating the primary lure is to click this link. No scripts were extracted from this sample.

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=anaerobic+biotechnology+for+bioenergy+production+pdf
    • http://files.reasawmills.com/uploads/1/3/0/7/130739982/f5253908cad30.pdf
    • http://vebon.thegoodsnh.com/uploads/1/3/1/4/131406893/25080026.pdf
    • http://files.sweetenyourlife.com.au/uploads/1/3/2/6/132695829/virulo.pdf
    • http://moroga.dieselcoresupply.com/uploads/1/3/1/6/131636725/9207580.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/61087884169.pdf
    • https://cdn.shopify.com/s/files/1/0438/0111/6833/files/bozazolafebipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/vomukozapilufofi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/ikea_countertop_desk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/20177641242.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/20861500167.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/37245101291.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/yakuza_3_substories.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/canara_bank_saving_account_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/35930086476.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/51707121471.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/96055023268.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_off00005cd7.bin
84f36c3f0d7324dd85522c74769713d4f1b34f5fc1888c2c4d03adef088fc451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD7 5468 bytes
font_01_sfnt_off00006f74.bin
0b2bedacf8b77d982b0d405cd7d6cb65d85c27053d37167d09535cc9473c0b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F74 10140 bytes

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