Malicious PDF — malware analysis report

Static analysis result for SHA-256 b004c398b5220d48…

MALICIOUS

PDF

47.7 KB Created: 2020-09-02 06:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afc9fa27c953d921d7bbf1637b2c1b2a SHA-1: 5894e9a0d4df42bdc875b47ea51055be868fb66c SHA-256: b004c398b5220d486e7b5a75bb1c22b5d2c195d33dcc935ee0611974ac29bfca
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a legal document. The document body, though heavily obfuscated, contains the text 'Stipulated vehicle release agreement form' and the malicious URL, reinforcing the lure. The PDF also hosts a large number of links to other PDFs, likely for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=stipulated+vehicle+release+agreement+form
    • https://static.usrfiles.com/ugd/73f3b0_23b015e41e224e5d98cf00e543204525.pdf
    • https://static.usrfiles.com/ugd/79cb75_cd84076a59094b76bc2d56a20719e66d.pdf
    • https://static.usrfiles.com/ugd/ef253e_1190fc8ff7bc428988d70cbc08d242e4.pdf
    • https://static.usrfiles.com/ugd/52b593_6324924f641546b4848c1bd854ba1ef3.pdf
    • https://static.usrfiles.com/ugd/0aab01_d8d868f923b14f90b0da4ec13ce73901.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8529f23e5684facae91fdc610ea223f.pdf
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/46742039300.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5284/files/74057934269.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/limiting_reactant_chem_worksheet_12-_3_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/31111771139.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/22686330264.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_off00007c8f.bin
6b88a21346a04795a7b43e9b877c3970210564ad721fa56beb91e413721bddd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8F 5732 bytes
font_01_sfnt_off00008fef.bin
70311a471a994d906374c9daca583e82c77be88c22d66ff79c45718c2c0205f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEF 9860 bytes

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