Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcac901fd252da48…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 00:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf5975ff9083f6f32bda07d614bbf861 SHA-1: f072e7513506d5c84632d6fab90665b7a99fd5f9 SHA-256: fcac901fd252da4890a6764cbe07ce446af29f6a352cbbe1ae986e28655867b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document contains a mass of external links, with a primary link to `https://ttraff.com/pify?keyword=buzz+video++hd+1080p`, which is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify and other domains, likely as part of a link farm to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=buzz+video++hd+1080p
    • http://files.westyorkshirefurniture.co.uk/uploads/1/3/1/3/131398509/ligagipewopag.pdf
    • http://files.detranslations.com/uploads/1/3/2/6/132682806/98495.pdf
    • http://files.alexbenarzi.com/uploads/1/3/1/4/131453592/4870172.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/weight_and_balance_form.pdf
    • https://cdn.shopify.com/s/files/1/0466/2637/3797/files/joomla_3_templates_full_free.pdf
    • https://cdn.shopify.com/s/files/1/0458/1418/6150/files/black_desert_online_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/sql_licensing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/assiduidade_dos_alunos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/printable_shooting_targets.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/darazojuzodibizimekof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jatebilebasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/vedikut.pdf
    • https://cdn.shopify.com/s/files/1/0437/6572/7384/files/ejercicios_de_cicloalcanos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4d.bin
61e4dfd8dce5ff27c18ece12990207331f8c821de5be746398f19e0e9f3983e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 5080 bytes
font_01_sfnt_off000070a9.bin
3460020bab08aa8b9323eb50b5593aa42e00f78678405f93e0a7ba4d2657aea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 10176 bytes