Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88cad58be418157…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 00:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ea9ea1ae0d9b09daac642c552279b0 SHA-1: c6070331246c09401821c0513188c56fc3c76766 SHA-256: e88cad58be41815793ac15181515e8e2267a35ed454e4f8ce597f2bb66364272
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body also contains numerous embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or redirection scheme.

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.ru/pify?keyword=mathematical+excursions+aufmann+pdf+free
    • http://files.thebaptistchurchoffranklin.com/uploads/1/3/2/3/132302871/fd37c9c140ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/fozofupi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/deed_of_trust_property_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9927/5935/files/99022300550.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/uk_and_us_date_format.pdf
    • https://cdn.shopify.com/s/files/1/0447/6023/6183/files/causative_passive_exercises_eso.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/nujekuvemikiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8275/1893/files/5068995885.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/norajekodadozes.pdf
    • https://bit.ly/2GcB1pF
    • 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_off000068f0.bin
c590a8468850f2a6f4da3e8df7f11f5d680fc2ff009a62cc2dea25de056dc893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 5468 bytes
font_01_sfnt_off00007b68.bin
4b6e13587cb38d199629172f7b665454dbec6727ceb2c0733848e763ef960461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 10284 bytes

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