Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea88cf5b917d86e9…

MALICIOUS

PDF

49.7 KB Created: 2020-08-22 16:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a45c4e465786894b86fd87780b0b0986 SHA-1: 47d268ff7d96ae23781e6cbbd57536434f24b7cb SHA-256: ea88cf5b917d86e91f160b0b883ea05cdfd606d918a2c6f29faac23092b491a3
150 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, many of which point to a redirector service. The primary malicious link identified is https://ttraff.com/pify?keyword=java+spring+resttemplate+example, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of a mass external PDF link farm further indicates a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=java+spring+resttemplate+example
    • http://files.warrencoveconsulting.com/uploads/1/3/2/6/132695698/gelazekigiremamekul.pdf
    • http://gubed.thesportpsych.com/uploads/1/3/0/8/130874474/tizetaxogefit-jurumiwapon.pdf
    • http://files.vasilisaart.com/uploads/1/3/1/4/131407521/7c3eba87803aebb.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/likixatonebajakasanatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/gta_5_online_modding_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/swot_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/introduction_to_nuclear_engineering_lamarsh_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/2015_mustang_gt_auto_vs_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/cyber_crime_report_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/adobe_acrobat_reader_password_protect.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/18233728234.pdf
    • https://cdn.shopify.com/s/files/1/0430/5682/4471/files/vevolekuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/towaxavevok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.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_off000069c8.bin
7970eb729a5bf022e3cf692c9f54960349bb73c1c804f529c61ac7e9586af1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C8 5256 bytes
font_01_sfnt_off00007ba1.bin
593b70c041d5d5fcfaf478de6ec75d9a03a8b09905d4102824a37c97aa00746e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA1 12632 bytes
font_02_sfnt_off0000a448.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0xA448 16204 bytes