Malicious PDF — malware analysis report

Static analysis result for SHA-256 27be29ca6bd57078…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 20:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb3ebbb31fb01a3459d55770b1ab44f3 SHA-1: 34bc2a52fed16cfcf7c0cc324f5aa2d09d5aa8e7 SHA-256: 27be29ca6bd57078d9e0d1548e36c5d603063b35ee9fb9d5596f921d1def0835
152 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, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=santa+rosa+transit+mall'. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links hosted on Shopify. This suggests a coordinated effort to lure users to malicious sites, likely for phishing or malware delivery.

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=santa+rosa+transit+mall
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/tujanaduja.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/mukopabonuz.pdf
    • https://cdn.shopify.com/s/files/1/0462/6618/7933/files/58801658602.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/statistical_learning_using_r.pdf
    • https://static.usrfiles.com/ugd/3e87bf_0b1e7f445e394edc9015f74739d14d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://static.usrfiles.com/ugd/451461_16199fe0168c442a978fe58886bd4e2f.pdf
    • https://static.usrfiles.com/ugd/63d3ad_8a30e3fa1efc4d118938eabdef39f249.pdf
    • https://static.usrfiles.com/ugd/4ae4db_bb2e958929cd4d769b0efcab308076b1.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/bitlocker_performance_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/75878082768.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/8066691041.pdf
    • https://cdn.shopify.com/s/files/1/0440/7672/8485/files/85641304881.pdf
    • https://static.usrfiles.com/ugd/ae059d_16ede2e9d4e84d1eada0e9caf919b519.pdf
    • https://static.usrfiles.com/ugd/b0b521_7a46a0a2b43741989b77a2ef9f2a9202.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_off00005f2d.bin
0dab04165646bf4680ae3621e59f6884e74952855c47a7efbd2f44b20143fc6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 4932 bytes
font_01_sfnt_off00006fcc.bin
ed172cd8859f9ea1b3896735d34202254db4a7210aebfbe213f0b0cb82638a9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 9928 bytes