Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b074052397db6a…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 19:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715af8435aee503a74aee33ab393cf4b SHA-1: ede080387d450f375d9d33b35c1c6ba62a5dc834 SHA-256: f1b074052397db6a191ecc240502678c38f1fbd9cfb83d205fa5546965d09818
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, identified as a 'PDF SEO Link Farm' heuristic. One of these links, 'https://ttraff.ru/pify?keyword=arrowsmith+comic+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Arrowsmith comic pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to trick users into visiting potentially malicious or spam-related content. 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.ru/pify?keyword=arrowsmith+comic+pdf
    • http://files.just-abit-off.com/uploads/1/3/0/7/130775607/desomo.pdf
    • http://files.olsenandcompany.com/uploads/1/3/2/8/132815002/sokolisitetu-naloganilowuti-rumonibipeva.pdf
    • http://files.elkrivertrack.org/uploads/1/3/1/4/131437515/zejurupen_bokukava_dafaru.pdf
    • http://files.thestationinclaresholm.ca/uploads/1/3/0/7/130739906/9413505.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/wopawerik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/xoxetumazizijizugot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/boperevesabenowit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/lidexifedofisojosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/farunepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/14600539513.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/52538337894.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/49576598154.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/dipale.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/66764739969.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/16115720547.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_off00006e02.bin
bb3e98025ad3b93ab0a4b4dac086e5eb679fe238d2994f43228e7a88e3b2dc78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5232 bytes
font_01_sfnt_off00007fbc.bin
e186dfdeab48c56ad57f97b2bcec98c39478ce4d0dbe869afa4d7de41b7d2f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBC 10284 bytes

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