Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddcae6a91c174ba…

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 08:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ff63bed34f4aecba3f6afd7b2ba730a SHA-1: 182fc7c890fbd0a55faceb7d46887855a70f9260 SHA-256: fddcae6a91c174bad8efafadea23211c1b4d95824db2f525501009b52a6d478b
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, pointing to 'https://ttraff.com/wix?keyword=bare+necessities+sheet+music'. This URL is presented within the document body, disguised as sheet music, likely to trick users into clicking it. The PDF also contains a link farm, with 19 embedded links, many pointing to 'static.usrfiles.com', suggesting an attempt to broaden reach or obscure the malicious destination. The primary malicious IOC is the initial redirector URL.

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=bare+necessities+sheet+music
    • https://static.usrfiles.com/ugd/9d66c7_d70e1e54565d44ee8b78f156b4bac022.pdf
    • https://static.usrfiles.com/ugd/fd30ac_84235abcee5a48c6945e2706a4425436.pdf
    • https://static.usrfiles.com/ugd/d1d005_bfbcb0a3ac4a4b40a38ce7cc139990c4.pdf
    • https://static.usrfiles.com/ugd/68ec51_153e63c5e99e483db5eac2a80d9780fd.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_a4cac3d47bfa4a29bf340a354c15377c.pdf
    • https://static.usrfiles.com/ugd/09c3c7_66e8c84af6314321922aaa206beaca2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21abd4d10d4d0490ede476d398db3f.pdf
    • https://static.usrfiles.com/ugd/48f461_6eda2e35f65d4d0b8dcf41cca551bc02.pdf
    • https://static.usrfiles.com/ugd/822ecd_ac6f57c89c7f47ff8a1c7973734cd579.pdf
    • https://static.usrfiles.com/ugd/b8c837_451c69a7ab8d4a5fa28f1bf65de6d96e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdf
    • https://static.usrfiles.com/ugd/b8c837_1eeb1d42e4af45868d3c1e9680d850aa.pdf
    • https://static.usrfiles.com/ugd/d54300_86554ad3e2214d6592d5b00007082f50.pdf
    • https://static.usrfiles.com/ugd/f459ea_f18cf0df963d485d8af74c762d6dcfdd.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/46545779524.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/ceh_certified_ethical_hacker_study_guide_v9.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/55809102470.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8454/files/bluestacks_4_offline_installer_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/30502298669.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_off00004d1a.bin
e5de79a5e4018d4d91b6724935c3b0794d02a34dea38afbf01c34421332db1af
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1A 5056 bytes
font_01_sfnt_off00005e12.bin
c6850aaa09381d7b60bf5818b07e74bd24ccbe498acd8b42c8f84e46c26e2100
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 9640 bytes