Malicious PDF — malware analysis report

Static analysis result for SHA-256 a084652920af3505…

MALICIOUS

PDF

49.4 KB Created: 2020-09-02 03:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f69f73c84f3fc09dec5cb57f82f1054 SHA-1: 77b45972fd16290fe7a9ebc2dc7ad41c75a8063e SHA-256: a084652920af3505a2f50bfdc0421a1e76364b4f2fff7239302a0776656a5f46
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, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=html+tags+list+pdf'. The presence of numerous links suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. 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/wix?keyword=html+tags+list+pdf
    • https://static.usrfiles.com/ugd/49be48_3ffe97a791b9483cb5d3df08fb3eb4b4.pdf
    • https://static.usrfiles.com/ugd/314c35_d7f91b95274649e094f47148dc3e0405.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_709826ee42ae4b6d89b85ecc004fe65e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bead4e9c68543a59eed809cbc10e605.pdf
    • https://static.usrfiles.com/ugd/c0b427_28c07018096240d68efe98b5722cf0ac.pdf
    • https://static.usrfiles.com/ugd/83b1b3_da311f70df784e2bbcbd5a5033297159.pdf
    • https://static.usrfiles.com/ugd/162fe6_f7e383b5f3834a3fa0e6b855aafcec45.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/fitajewovetipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/45077615964.pdf
    • https://cdn.shopify.com/s/files/1/0435/7849/1041/files/jewujabofogelogokujakivu.pdf
    • https://cdn.shopify.com/s/files/1/0464/7285/5702/files/18753550909.pdf
    • https://cdn.shopify.com/s/files/1/0462/7487/1458/files/83573304330.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5018/files/13752940571.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_off00007787.bin
c8e1cbad29e40434c948bc2f0030377878c02efced74f25c38e2ab4911ad762a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7787 5228 bytes
font_01_sfnt_off00008943.bin
b63aa333104d061c0e893fc556d11023ac8cb6dfcd24ba880a8055cc2af4c4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8943 15436 bytes

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