Malicious PDF — malware analysis report

Static analysis result for SHA-256 af61c552233e8d06…

MALICIOUS

PDF

42.4 KB Created: 2020-08-26 11:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62d5f80804558e9bf36d0e9f7a4b734 SHA-1: 04d5ba8a7f2d6c156d0d9f5c3d1bc050efd359a7 SHA-256: af61c552233e8d0680d24ffc3b8e4f2dc6e12a11c5ec8f2bdc3847e60cea1d44
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm, with a primary malicious redirector URL. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on Shopify, suggesting a coordinated effort to drive traffic to malicious infrastructure.

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.me/pify?keyword=olhos+de+deus+8+pontas+azuis
    • http://files.marilynoconnell.com/uploads/1/3/1/4/131452836/kovamebiragifem_dovitu_wojedodek.pdf
    • http://files.ericamweaver.com/uploads/1/3/0/8/130813876/5071465.pdf
    • http://files.millertimegolfleague.com/uploads/1/3/0/8/130813988/gijad.pdf
    • http://files.merakibeeswaxwraps.com/uploads/1/3/0/7/130739027/420664d95b.pdf
    • https://cdn.shopify.com/s/files/1/0447/3195/7397/files/patanjali_ayurvedic_medicine_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/34919863779.pdf
    • https://cdn.shopify.com/s/files/1/0438/0049/4237/files/96143028935.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/19254938062.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/gasosatarepidapezasurorif.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/lista_de_alimentos_ricos_en_magnesio.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/django_template_dictionary_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/85993596481.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/bar_plot_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/63502010137.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/tokalavuvu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5038/2998/files/79694169774.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/23604492311.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/73991992565.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/3498900124.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_off00005f15.bin
f20c9923d293de2ea342e5abf740783cabbd50c0c68b46e7547f76cacbe55d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5224 bytes
font_01_sfnt_off000070d5.bin
de98b356c0c1fd0b531af14fb4a7a46ee72c5b0347b975a5f6cdfe902bc13b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 14524 bytes

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