Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf9e62e6151234d…

MALICIOUS

PDF

44.7 KB Created: 2020-09-02 12:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5e620ecf97aa3a18cf959b18d438400 SHA-1: 4cddb4e5f81887e052d927a568bca246c7b15d17 SHA-256: ccf9e62e6151234dcbf8a27591ab4defc0b87fce9341f8d94c563f79c05245ae
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.club/pify?keyword=ssc+chsl+2019+syllabus, which is likely used to redirect users to a phishing or malware site. The document body contains obfuscated text and the identified URLs, reinforcing the malicious intent.

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.club/pify?keyword=ssc+chsl+2019+syllabus
    • https://static.usrfiles.com/ugd/934fc3_20fa6a0cde1b48f1ae67b30568241962.pdf
    • https://static.usrfiles.com/ugd/0511f5_1556e345419048cfbf62636fc66d4293.pdf
    • https://static.usrfiles.com/ugd/b16523_2169c2d271574caf9185e4a01b6357cf.pdf
    • https://static.usrfiles.com/ugd/ab63e3_78c533affe4a4d6e980faf08642d0c4d.pdf
    • https://static.usrfiles.com/ugd/19103d_2ea89a1308db4854887040bf965098bc.pdf
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/22704995980.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/buku_adversity_quotient.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://static.usrfiles.com/ugd/77d535_5622801c8725480a991cda6adef85895.pdf
    • https://static.usrfiles.com/ugd/7ff653_e59bc0f8ce984241af6fa0e5d10c6ec8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4524433bcc421e9814eef27954b225.pdf
    • https://static.usrfiles.com/ugd/2d797c_3631ba507da34eda81c029dfc89c6266.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_2ad71d1329a64de2a8984aaaacfe7049.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/vutewakozafajipuwevonemu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/accounting_question_papers_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/61562307315.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/
    • https://cdn.shopify.com/s/files/1/0432/5244/943

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006faa.bin
e7e242df901a5820a1a6e1c54d5b361dd9389bc7b18f620a2cf82f48979f05bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 5616 bytes
font_01_sfnt_off000082c3.bin
417f88a68a63b67c3c505a819461084c48864de7d134d40c504b757c9a0ff940
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C3 10300 bytes