Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5795011bbdeb81f…

MALICIOUS

PDF

41.9 KB Created: 2020-09-06 00:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa534ebbd998bf497b22b71cb4e1e61f SHA-1: 1a1a0b10b480305ac6720269255d90d661f0b4c8 SHA-256: b5795011bbdeb81f4a59e87d1686f4b0880140bb72f9d98e2fe19f9385cbb8bd
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to a job rejection letter, which is a common social engineering tactic. It embeds multiple links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.club/wix?keyword=form+letter+for+job+applicant+rejection, which likely leads to further malicious content or malware. The presence of a link farm also indicates a potential SEO poisoning or traffic generation scheme.

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.club/wix?keyword=form+letter+for+job+applicant+rejection
    • https://static.usrfiles.com/ugd/ceb2e8_c54588022dc34fe5bffd00cd5e429eb8.pdf
    • https://static.usrfiles.com/ugd/fedf23_dbe5bb45fe05413cbd7f2b7f703a4531.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_9ea9bcad24894abb82d59b823e83dfcf.pdf
    • https://static.usrfiles.com/ugd/a51aec_f13270c3289d410995517535e630f983.pdf
    • https://static.usrfiles.com/ugd/122077_dda4191c91d54f348b974974d72cf2bc.pdf
    • https://static.usrfiles.com/ugd/ce77c6_c147cdcd7eab49a3a6a12d2fce08795e.pdf
    • https://static.usrfiles.com/ugd/cbe325_5b27540070f54faf9c82b2712993edb5.pdf
    • https://static.usrfiles.com/ugd/d01287_d38998d32e12474d8947b1b0f975222a.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4811/files/8946520199.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/2963130630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/46658163947.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rakapadanixip.pdf
    • https://static.usrfiles.com/ugd/cac9e4_3665825163a3434a8dc0b4f2b96828b2.pdf
    • https://static.usrfiles.com/ugd/bf0735_53c1fcbd78f54fcfa699b3e14b6a682a.pdf
    • https://static.usrfiles.com/ugd/b3bc21_3d65a2d80a344ec4a700604014627737.pdf
    • https://static.usrfiles.com/ugd/5c9621_d4fad36280384a8dbde1847c2bb0cdb5.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_off000065d3.bin
bb9a4cbfd41516493dc7eee59606d9770df466c96a4bc8f903434f26387b0ff2
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 5152 bytes
font_01_sfnt_off0000774c.bin
8c2b62d6f4b77aef19b374530aad40fb76d57382809d388d39ddf079138f068e
pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 10400 bytes