Malicious PDF — malware analysis report

Static analysis result for SHA-256 1147af7392b99990…

MALICIOUS

PDF

64.2 KB Created: 2020-08-16 19:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7090b0e3c9c9f06aa7daca51b3ca4b18 SHA-1: ea783d7fb8d1349c33d9447fb62602e7f024531c SHA-256: 1147af7392b99990ef21856a9793182756966cd57a6387021163208d78b1a39d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=financial+aid+appeal+letter+template'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking through to a malicious site. The presence of many links to benign Shopify PDFs indicates a potential link farm or SEO manipulation tactic to disguise the malicious redirector.

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.com/pify?keyword=financial+aid+appeal+letter+template
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • http://mokiji.lidgettandbeyond.org/uploads/1/3/1/4/131453284/jewovixulosu.pdf
    • http://xisodij.commoncrazy.com/uploads/1/3/1/3/131378991/ef520be9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/free_worksheets_double_digit_addition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/91676511184.pdf
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/anesthesia_and_analgesia_in_laboratory_animals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/58908104095.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0927/files/tebiguweni.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/articulo_de_opinion_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/nivokewatafifasovizubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/4333690202.pdf
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/total_azolla_zs_46.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/angkor_wat_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/jidusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/bsc_computer_science_syllabus_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/3427/4966/files/broad_based_black_economic_empowerment.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8d7.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D7 2828 bytes
font_01_sfnt_off0000b2d2.bin
66fa53c190ce47cd83b0f5448f798d4c9ada0fd2fff241e344d2cbde75982f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D2 4676 bytes
font_02_sfnt_off0000c285.bin
298a9754c8200fd5d928654b4d088897e5fa6deaf7347943ebf417640fe65803		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 10012 bytes
font_03_sfnt_off0000e4c8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 4324 bytes

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