Malicious PDF — malware analysis report

Static analysis result for SHA-256 20254848348fcd32…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 10:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 831d0f085a4a0ad3c42f9c1fbf2059d4 SHA-1: 4e17327d90e7ca7bd4fbd03cb45b3cd9c8077f7e SHA-256: 20254848348fcd3253d8308523c6dfe297da13e3c89aa1bc9d1c9e7f3704bb26
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=local+business+definition+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a PDF link farm heuristic further suggests a tactic to distribute malicious links or content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the final payload.

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=local+business+definition+pdf
    • http://nebad.nonohairremoval202.greatwebsitebuilder.com/uploads/1/3/1/3/131383657/9ff27255cd5f106.pdf
    • http://fadafi.anatomy-demystified.com/uploads/1/3/1/4/131406436/114d2a86.pdf
    • http://rakiko.yourangelarmy.com/uploads/1/3/1/3/131383613/3347506.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/80057032875.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/17108041427.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/southern_and_northern_blotting.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/99987487773.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/calculating_magnification_worksheet_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0919/files/99482441994.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/56758362164.pdf
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/jogufufow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/aromatic_rice.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/99193483347.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/bujumeliwafomudupizali.pdf
    • https://cdn.shopify.com/s/files/1/0445/8535/3380/files/practical_reliability_engineering_5th_edition_download.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_off0000609d.bin
4f91167c59749bca727368670844bb704b324ab6d7c759e9fc6a5fda1c0c1c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 5136 bytes
font_01_sfnt_off00007216.bin
e4f2805f96e7bea07c9c3fffbdaebf72317775869af997bc1c77eabe5d0b4ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 10504 bytes

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