Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b1ffd0ac166b88…

MALICIOUS

PDF

135.9 KB Created: 2020-08-17 00:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64203516bd66ef8a7c21810b0afdbb97 SHA-1: 67562d55e7e51bbf4ac5d6a96074fab60df33ca5 SHA-256: f1b1ffd0ac166b88b4608e73a48b242be7374e92061e557a4d405b748763c99a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link and a PDF link farm, indicating a phishing or scam attempt. The embedded URL, 'https://ttraff.ru/pify?keyword=chemistry+book+2', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'chemistry book 2' and the URL, reinforcing the lure.

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.ru/pify?keyword=chemistry+book+2
    • http://files.christieriehl.com/uploads/1/3/0/8/130874347/gimidukepadegubipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/33545346938.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/jaxusopuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/pdf_to_word_download_app.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/54592767930.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/zitomunadinirumugur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/acetonitrile_msds_merck.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/rrb_alp_psychological_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/vumofobodudurinanidi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/46113102510.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c039.bin
c1608285ace7c1b0205aaabfec964ff431656e71e73ba33d86ccb707d4878947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C039 1840 bytes
font_01_sfnt_off0001c8df.bin
388a660889415739b24ef63af338a3fdd100691f4bdf493fef2186f1ecfcf410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8DF 4824 bytes
font_02_sfnt_off0001d949.bin
dcf37b180f61f383ad2d3a5f07f8057e064ff72b43ff6abcf2d7fc1bfb56785a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D949 13380 bytes
font_03_sfnt_off000203f0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x203F0 4324 bytes

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