Malicious PDF — malware analysis report

Static analysis result for SHA-256 836ad20976ebad59…

MALICIOUS

PDF

43.5 KB Created: 2020-08-25 03:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dccaa472a748731c522f4251be97aa6 SHA-1: c70435ed5b763c39d003b8c986db329a0cf707e6 SHA-256: 836ad20976ebad5915cf60157611bca6097f2802e635f3ab9ae6715ecebde4c3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=block+calls+without+caller+id+android'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on shopify.com, suggests a link farm used to obscure the ultimate destination or to improve search engine ranking for 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=block+calls+without+caller+id+android
    • http://wipemila.capefearorchid.org/uploads/1/3/1/6/131606349/5d0a7428.pdf
    • http://dakebage.pachamamanativeart.com/uploads/1/3/2/6/132681352/7be39672d.pdf
    • http://dezima.vipwoodenpens.com/uploads/1/3/1/0/131069839/3921818.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/16365436915.pdf
    • https://cdn.shopify.com/s/files/1/0449/4861/9419/files/margaret_atwood_the_testaments_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/samsung_bholanath_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/5065/5129/files/92632101640.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/super_mario_bros_3_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/53313564391.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/masegoduxivav.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/57613926613.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/39347080641.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_off00006a78.bin
fee6be3946f945f44d4259b0fda8dc21285abec46686303f7ce3d33446434356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A78 5232 bytes
font_01_sfnt_off00007c45.bin
92252dede4c83c429b1dd53b1fd980866714e6fad39111171262732f20c05ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C45 10792 bytes

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