Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30653ec379e5d27…

MALICIOUS

PDF

45.4 KB Created: 2020-08-15 10:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97b6ac534dd270f9ce0a326b6e2c339 SHA-1: 4ae8afed65d6ea56a8183d534a00b1ddae8e589e SHA-256: c30653ec379e5d27fae42b845036664429ad12cf2e0d56eaea0266fc4db2e1a0
130 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a font download, which is a common lure for phishing or malware delivery. One of the embedded links, 'https://ttraff.ru/pify?keyword=font+gabriola+bold+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, some of which are benign. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to malicious sites.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=font+gabriola+bold+free
    • http://files.electaylin.com/uploads/1/3/0/8/130813851/9800163.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/hls_streaming_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/jamasebozujesozuju.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/22546384492.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/33735520046.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/bexezadirab.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/sepajuriluberobotuneta.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/novukedixarogomob.pdf
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/sonupijerevadivasodorul.pdf
    • https://cdn.shopify.com/s/files/1/0434/6488/4384/files/tarorobabojor.pdf
    • https://cdn.shopify.com/s/files/1/0448/2682/0765/files/download_buku_pendidikan_agama_islam_kelas_11.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/8579207142.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_off00005eaf.bin
f8f2522cd87470dc85dde6314c7fbc35cf21054cf6bf1b24386da9771298a772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAF 4992 bytes
font_01_sfnt_off00006fbd.bin
535207dc80303bd229ea675b78b09969adea6034edff32b570c154b08fa48d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBD 10600 bytes
font_02_sfnt_off00009431.bin
a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9431 16084 bytes

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