Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91a9d91743ac2e9…

MALICIOUS

PDF

55.7 KB Created: 2020-07-26 14:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ad712027d7384a6f5035a99537ab3ae SHA-1: 986b389152984221eb50128aa0e6a91d74217f29 SHA-256: e91a9d91743ac2e9a3a2480484d1e24bdb0e7dbb8954a42d5d20ca7dad3d7be8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The primary attack vector appears to be directing users to the 'ttraff.com' URL, which is flagged as malicious.

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=double+bed+sheets+online
    • http://files.shedrums.net/uploads/1/3/2/7/132741181/mogit.pdf
    • http://files.onelinerjokelab.com/uploads/1/3/1/3/131381411/gosenewoxo_ketegakeses.pdf
    • http://files.shipleyartstudio.org/uploads/1/3/0/8/130873738/pirodi-purirexepo-sotubifav-wavilolujufuna.pdf
    • http://files.aitnde.com/uploads/1/3/1/4/131453540/pabolaro.pdf
    • http://files.aitnde.com/uploads/1/3/1/4/131453540/pabolaro
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/saxipekifigim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/29499093020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/pimunibapuxipumibelinaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4344/files/vafisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/bukegonidobinevaniko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/lawiwapij.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/kigurag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/62856505184.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/21887568997.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/44588401334.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/70968551915.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/13138812829.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_off00008843.bin
3c57d5a3a432eaa186725e6b10804013985feb9b93161dea4e7884f945614e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8843 4628 bytes
font_01_sfnt_off000097ee.bin
9ac59a084d148a827eb939463208aa1fa3ee2e5b0ccee44684353bc6ca097ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x97EE 10580 bytes
font_02_sfnt_off0000bbca.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 16164 bytes