Malicious PDF — malware analysis report

Static analysis result for SHA-256 61237f563d51f39d…

MALICIOUS

PDF

75.9 KB Created: 2020-09-01 04:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83ef8d083b0d470faf0cff5312b34754 SHA-1: d8e54b3f5b843185d6ef879d3bc20ed727723e66 SHA-256: 61237f563d51f39d2f2c322a6cfa072ed77f144cfaecc3cf1b39b57d1fdf04dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=abs+cbn+news+reporter+names'. This URL is likely used to direct users to malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute links to various malicious sites.

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.me/wix?keyword=abs+cbn+news+reporter+names
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5499/6375/files/68837207270.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/polivewerokexesuserilun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/76210019909.pdf
    • https://cdn.shopify.com/s/files/1/0436/7459/9574/files/vujonavusasuxeje.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/lofudomekub.pdf
    • https://static.usrfiles.com/ugd/fd7405_c627da19e118485697a34109607d7846.pdf
    • https://static.usrfiles.com/ugd/d775a9_894dab2a00d043e5a8b938dd99d59192.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_08e796087a124c048438d7c4e2936313.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d874fdff0444ab6a2898bc7ca32f4a5.pdf
    • https://static.usrfiles.com/ugd/a31856_0931e439b3cb498eb0b6cd7676b7a399.pdf
    • https://static.usrfiles.com/ugd/7d21c0_8622999a6d83449b8c7c991cd7aeecea.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a68b588fcee4f509b10402ac94df59f.pdf
    • https://static.usrfiles.com/ugd/a771bd_3d9ecafe8dc7420fb68bcdb8ab8cfd41.pdf
    • https://static.usrfiles.com/ugd/6f7357_180899b95c4f4924a5fe7d9c30c6945b.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec77.bin
f592db28414433a8f631103ec4daa84cb5320769887a1f3d73e0c5c12998519f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 5268 bytes
font_01_sfnt_off0000fe59.bin
e81a6b8df12c90f463de5a25cc3ad121e9a9967f55099824f7d7a46878842fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 10552 bytes