Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a014ffcfff8efae…

MALICIOUS

PDF

35.3 KB Created: 2020-09-05 14:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f7836d89eb5d695a51e767dac80e08 SHA-1: b2ac9aa5ae6526472204460f49e488e3006f45e4 SHA-256: 5a014ffcfff8efae2f33d14eeb566d2304833325e4ccd4e3d202caad118b8a95
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, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text but includes the target keyword 'aviation english macmillan pdf free' and the malicious URL, suggesting a lure for users searching for specific 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.link/wix?keyword=aviation+english+macmillan+pdf+free
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/44470380525.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/bavufatobusubuxuwusozura.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/phosphorus_cycle_in_aquatic_ecosystem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/94_in_roman_numerals.pdf
    • https://static.usrfiles.com/ugd/73cb9e_d2e3039d27c34edca296a91fd9ad2d45.pdf
    • https://static.usrfiles.com/ugd/5ecadc_1077421541b940cd8055d520a4e74c82.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_36476d0e360d4da9b5764c11d5498ce8.pdf
    • https://static.usrfiles.com/ugd/15cd4d_19a4aa3b22524572840271025b93b939.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4b27a19a9c04f3e986963b242c21e9b.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_0c033afe072b412286f214c7045d7bef.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/siradagofekes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/anthropology_and_hamartiology.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/wujotovebemezuterofowegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/wokexuzunulet.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_off00004caf.bin
69a276ee0e3887cb2071a79818be52c250e7fb63670c402b3d0c76b59649a517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAF 5620 bytes
font_01_sfnt_off00005fae.bin
3ca8e21d37477add7ee9ef95daa10187200bf2c59f75496fa86fa5062bbbe96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 9716 bytes

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