Malicious PDF — malware analysis report

Static analysis result for SHA-256 65efb004e303d980…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 15:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70cf6ae65e7c4d37ebb325e9b23e694a SHA-1: af7bb31bf9968ef9bc32da6a5f3cf9c144e4aa54 SHA-256: 65efb004e303d9808354832c1f220e5665dd6bd977bc6caaf3b2b9939fdc34c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious URL, likely a phishing lure for Apple ID credentials. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for phishing. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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=apple+id+sign+in+on+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/67166588279.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/artre_carotide_interne.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/metivagov.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/44120069321.pdf
    • https://static.usrfiles.com/ugd/ad2ade_b88c6bd74f264b939bdaf478227c4694.pdf
    • https://static.usrfiles.com/ugd/269bb8_5d448d6d3b514c7ab770761600855fc9.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/coldplay_fix_you_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/binomial_distribution_multiple_choice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9203/files/attunity_replicate_user_guide_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/great_american_cookie_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/badminton_rules_in_marathi_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/furujezaxaze.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/small_merge_split.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_off00005f07.bin
ba1d52edcc4f982c38e36406d5c78e6793324c693ece27cb3d247fc406d6c691
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 5116 bytes
font_01_sfnt_off00007078.bin
07c01739f423ed8d7f05672ec6beb15e11b6f58e00b2b122183a0de2aa1b2c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x7078 9564 bytes