Malicious PDF — malware analysis report

Static analysis result for SHA-256 e422b9f7fbd3e847…

MALICIOUS

PDF

52.6 KB Created: 2020-08-26 10:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efba6d08ac974f85a400ddd5f57fa2bf SHA-1: 531e2e76f652a496261836f48219d7113d399b65 SHA-256: e422b9f7fbd3e847fac685a3dfabfbeab9d1887da0f3e169601568b3c504be70
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=el+noi+de+la+mare+tab'. While many other links point to Shopify domains, one other suspicious domain 'zogab.tsapconference.com' was also found. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious content.

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=el+noi+de+la+mare+tab
    • http://zogab.tsapconference.com/uploads/1/3/1/4/131482992/8505816.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4356/files/6856331707.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/chasm_video_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/jumbled_words_to_form_meaningful_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/chipotle_catering_prices.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/25542191474.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/buwenumokenuragilutijepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/vebagemixudukakawatason.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/after_livro_5_baixar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/xutudajibuzepimezisozi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eda.bin
6efe055388e66f82e658f815eee250bf7db8ba0cdb428d6f6b5cde2bd7a190e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 4892 bytes
font_01_sfnt_off00007f60.bin
9fc53d6156f3e783e51059ab0658a79c4cb749713a5eb885e7f3255713831d79
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 15548 bytes
font_02_sfnt_off0000b00e.bin
fb79e0d55dc4e61b502509b94c34e3979506147e9f0095990b5de9f10a29c823
pdf-font-stream PDF embedded font (sfnt) at offset 0xB00E 16320 bytes