Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02d7ec56b2466f2…

MALICIOUS

PDF

67.1 KB Created: 2020-08-30 06:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ba516fbc54394a5de162943c4fd031e SHA-1: adcd8a687ed662d65e1c3db428cbc96ad20345cf SHA-256: a02d7ec56b2466f2f41558d6c5b4112ddb3ac3535bd9af2247b21c7d59d70765
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text and a prominent URL, suggesting a lure to a malicious site. The presence of a large link farm indicates an attempt to distribute malicious content or conduct phishing.

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/wix?keyword=personnage+charlie+et+la+chocolaterie
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/fubavet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/printer_adjustment_program_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/spanner_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/13694701081.pdf
    • https://static.usrfiles.com/ugd/e02969_d990c1bdfbaf4d6d88a08ef2be639701.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/brutalism_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/70024702155.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/53172792379.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/koxaluzotenuluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/69058949433.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9837/files/48711455636.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_off0000c5d1.bin
53c74770172418fac29343ced6149ad1e4eaf299cf2b81151e67a82aba11bf3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D1 5060 bytes
font_01_sfnt_off0000d6f6.bin
2d2348fa583547ddde40535ea9a7d5eebf581770b48a4d3d6931643ca98becbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 12448 bytes