Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe26739ba3f9cf1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-16 13:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50a0754e1cc1efd503fe5143943109e8 SHA-1: acba93f21ec376f7aef2515071568fc1da4e5939 SHA-256: ffe26739ba3f9cf1d72d8775c2fe3472d2e45f5c07c547409925da2aedf665e1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to educational topics and the malicious URL. This suggests a phishing or scam attempt designed to redirect users to malicious content.

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=mathswatch+adding+and+subtracting+fractions+answers
    • http://files.delivertrust.com/uploads/1/3/1/4/131453870/6880090.pdf
    • http://files.coolgeekzatl.com/uploads/1/3/0/8/130874647/2836dd6b9b7a71.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/seismic_waves.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/rukimotakisen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/mebex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/zobovirasasekijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/katobebozorosawexisaxamob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/loophole_in_lsat_logical_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/zunudigukatoxezeviluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/vitofofewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/77160595872.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/art_and_artist_rank.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/dedadataripubixetekosij.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/john_deere_44_plow.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/jalolofusojomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/dojeraj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/xapawitaserunaworotivajez.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_off000065ae.bin
7f3c911ce98cf7b99f929087ffd2602a7f0023131f9b43435e41d4e0c51a51e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AE 5488 bytes
font_01_sfnt_off0000785e.bin
e7422c13301b4e91327f93cfe7dadf5b1199292284f541f9f940bb8b75040bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785E 12860 bytes

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