Malicious PDF — malware analysis report

Static analysis result for SHA-256 b113902ab699f956…

MALICIOUS

PDF

52.6 KB Created: 2020-08-29 03:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b2c7f1d6d6a92de2b0cd6d7a235db5 SHA-1: 04ff6e4c00f9174fdbcb72178b759e5a3c130eb2 SHA-256: b113902ab699f95626f9ee3b6dfe8680f05b9e2a66404db25a9c6d902c87e5fe
128 Risk Score

Malware Insights

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

The PDF file contains a lure for a free book download, which is a common social engineering tactic. It embeds a link to a known malicious redirector, ttraff.com, and also includes a large number of links to other PDFs, forming a link farm. These elements strongly suggest an attempt to direct users to malicious content or further phishing 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.com/wix?keyword=free+download+of+to+kill+a+mockingbird+pdf
    • https://static.usrfiles.com/ugd/b8c837_cf60f71e75e84616866dc899ae96b425.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5ee06e698d144a9bf690d5043493013.pdf
    • https://static.usrfiles.com/ugd/b8c837_da67616249a94069aded818778114e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d824dd26c0dd4b38ba26063f9bb9d10e.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/talikuvikilajefuwabokefos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/nejirimuretigipijexowod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/99604576160.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/50068510133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/27744709222.pdf
    • https://static.usrfiles.com/ugd/b8c837_e73519f9ed3340439bb3c4590368a882.pdf
    • https://static.usrfiles.com/ugd/b8c837_893dac0340ab4e1f8b41f172dcd4a74f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c0e9fdcae2349c7a7723f529029c282.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cdb6847933b43199d51d19747e5f3ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae7da68bce8846499a4a1e36268d7291.pdf
    • https://static.usrfiles.com/ugd/b8c837_e93bba4aaf294c8580a8d5815231a183.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_81e8c549e290426da2139fed73d8dbea.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_off00007d51.bin
07494743dd4e4e37569da9b855f453bf5fecc36832ab20e0f045f0ed22333c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 5336 bytes
font_01_sfnt_off00008f74.bin
be67e18bd28cbf3dc21432513c2c35055e54653b354cb809fa5ffc77f2f02af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F74 12348 bytes
font_02_sfnt_off0000b6ec.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EC 4324 bytes