Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdd45036b4b2a56…

MALICIOUS

PDF

34.6 KB Created: 2020-08-31 08:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e89c99d28774619878d9d492bc40cf SHA-1: 3e369860af6bcc765c062988a109be6a9a11b220 SHA-256: ccdd45036b4b2a560ef4c4b69361a6ba8f185cc6ddb27e6bcaf87a4598903f16
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a programming book. The presence of numerous other links to 'static.usrfiles.com' suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=starting+out+with+visual+c+4th+edition
    • https://static.usrfiles.com/ugd/ec0c41_2ab02dce4a044c659e677ab8f0f162ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_85610b545a39410487a610b3e7dfc8c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_42ea0d87af1e4d1a914af7bc1e3cd140.pdf
    • https://static.usrfiles.com/ugd/df4650_73785fc9e7ed431698c500038e795c98.pdf
    • https://static.usrfiles.com/ugd/e643da_f9afa1168b764c84930fa11cb16e043d.pdf
    • https://cdn.shopify.com/s/files/1/0435/5375/1189/files/create_book_mockup_template.pdf
    • https://cdn.shopify.com/s/files/1/0464/1348/0104/files/app_inventor_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/80681740059.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/christian_theology_millard_j_erickson.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/tobulabaximuxufujexo.pdf
    • https://static.usrfiles.com/ugd/c3f88d_9c4f8e70ae4b44d0bcb8cc826a8d0ab9.pdf
    • https://static.usrfiles.com/ugd/a91264_77fbc58b824546ce9193dc33b0ca98f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b51c96207ff748869eea4b0dcbe50a33.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/82047732720.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/guxifezawoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/liwobavumakogip.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/vapudolinojaninatulelez.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/zerixikegifoz.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_off00004912.bin
a40bd60f1e0759d19b2b80fa24af57b875a1f3dcb19a64b7786cab48bf42a290
pdf-font-stream PDF embedded font (sfnt) at offset 0x4912 5544 bytes
font_01_sfnt_off00005bf2.bin
f7dff0e6b831dfab2d84918b5833d1faefaf443b579687c3bbb504d1bc103149
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 9676 bytes