Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c917f571bfe02d4…

MALICIOUS

PDF

60.7 KB Created: 2020-07-31 09:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65310233ace57aa57e97615aadafffc3 SHA-1: c3f43e43c8bc20c242ddb8d981f317c53c9608e7 SHA-256: 3c917f571bfe02d462d39ae416de80d7de6f5e0948f426807d969f352244249c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=candida+diet+recipes+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to the lure, reinforcing the malicious intent.

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=candida+diet+recipes+pdf
    • http://files.socorroboutique.com/uploads/1/3/1/6/131637218/896ba598a1f5dfd.pdf
    • http://files.freeurnsforveterans.org/uploads/1/3/0/8/130874510/taruro.pdf
    • http://files.derekrecks.com/uploads/1/3/1/8/131858747/devikukogiku.pdf
    • http://files.steppenwolfphotography.com/uploads/1/3/0/8/130813111/1214940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/971632773.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/66836218566.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xumajedudiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/17759433757.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/5821242303.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/zirujuvakowejep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77084518355.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/17029358013.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/kaxax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/96755276306.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/telidovumokoxoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8403/7792/files/womotimila.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_off0000b170.bin
82bf5fa4d1b819a5f93f47d8bd604b897ed0b69e6e085b73e11d768d9bca8717		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB170 4820 bytes
font_01_sfnt_off0000c1db.bin
db03c6e83a1627b619cdcc05b3206da279c9234b0d42dfbe5dbe0d00996c9918		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DB 10328 bytes

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