Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09cb0e0597a3ec0…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 18:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa4f1293e78ad89339585dfc1908375a SHA-1: b9c6f71aca9219f44c0780bfe54193ae5f057ace SHA-256: d09cb0e0597a3ec0630da0148a1fbacf8103787d3d7b99211ab778eaa3887d31
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of these links, 'https://ttraff.cc/wix?keyword=a+silent+voice+film+vostfr+streaming', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large number of external links, many hosted on Shopify, indicates a tactic to obscure the ultimate destination and potentially leverage benign-looking domains for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=a+silent+voice+film+vostfr+streaming
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/converting_units_of_time_ks2_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/gezironipazosadoburaja.pdf
    • https://static.usrfiles.com/ugd/b7306e_3e869165606746ffaeace173fd296049.pdf
    • https://static.usrfiles.com/ugd/8b9728_506a5fc70c9c4ac0a8619565a88f58cb.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/background_design_psd_files_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/36766181699.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://static.usrfiles.com/ugd/7f929b_2c8c253cce6646ac9d3a3d797f4e7471.pdf
    • https://static.usrfiles.com/ugd/b8c837_cad9da7fa409402b9399a38ecaa6359b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffa8688089a64fd181585a1459adc7e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd0c15b13944d3c8c0a7ccd19bb429c.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_off00004c89.bin
b9ee99e76d9cb8216e198babbbbf515ca18b946448e596103604655bfce31e8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C89 5248 bytes
font_01_sfnt_off00005e51.bin
6590d5e61f83d3acd1a60b135d7411b73f49b565401fd4c25b4fd8a5e053b0ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 11656 bytes
font_02_sfnt_off000084fb.bin
7d4e8f5d23301be60dd5dbec87fc18e9c99ea65bcd6b0740d82a99f43a961835
pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 17220 bytes