Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef208ec4f515ab39…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 05:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 617fa73f854454e428700e9491e4d016 SHA-1: 54d4ee76beca413597c6c7eaa61a9b83f1c5e086 SHA-256: ef208ec4f515ab39c6709c506038e8ed2f41dbd9dc299d21120b01cdd1413ed9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cen-+sad+treaty+pdf', which is flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign PDFs. 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=cen-+sad+treaty+pdf
    • http://vewuj.lucidletters.com/uploads/1/3/0/8/130813478/62c975.pdf
    • http://files.gbmphealthcare.org/uploads/1/3/1/4/131454034/776769.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/gufamudaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/receipt_template_for_car_sale_australia.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/dababigotix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/butler_machine_tool_v_ex_cell_o.pdf
    • https://cdn.shopify.com/s/files/1/0428/5693/9676/files/surisulixudo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/12058264385.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/zorikenukago.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/41521894881.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/ct_shoreline_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/14019219079.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/nufatejom.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_off00006131.bin
638df54848ce5a89dec6255582aea1011e5c18ec96e08494f4c53247eb4ddab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 5040 bytes
font_01_sfnt_off00007273.bin
38b4b5ef37e271ec4b915ea49e7d47c014c240ad98a78db2c463b962d5488cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 10580 bytes
font_02_sfnt_off0000962e.bin
14d930fc825b26e8ea6822740a9580a6c52db238364176a73735cd4a82708aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x962E 17980 bytes

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