Malicious PDF — malware analysis report

Static analysis result for SHA-256 33577971c66f14de…

MALICIOUS

PDF

67.6 KB Created: 2020-08-10 14:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 639f718d04c31f3e95a00fb7a9c9c532 SHA-1: 725b24e04eb0d8c50a4b28921efe7c22270922be SHA-256: 33577971c66f14de633602946b8936dab85f23b4075a99460c99abe9058bcc71
120 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The document body itself is heavily obfuscated but contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted, and the primary malicious activity is the redirection via embedded links.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=lightning+protection+layout+pdf
    • http://files.avalonweb.com/uploads/1/3/0/7/130739330/8350599.pdf
    • http://files.nufec.com/uploads/1/3/2/6/132682655/4006865.pdf
    • http://files.loudouninvitational.com/uploads/1/3/1/4/131437873/99b0e.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/30626114744.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/dunijugixurorifodux.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/foruvuxefozevanifez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/94478966789.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/rejelewigerazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2491/files/what_is_instance_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/32844768305.pdf
    • https://cdn.shopify.com/s/files/1/0435/5994/4353/files/kowefepudetipof.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/fufopibolol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/kafuliz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/pofigunomuxetesotigetegar.pdf
    • https://cdn.shopify.com/s/files/1/0436/8780/5081/files/seven_deadly_sins_lust_anime.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_off0000cb7c.bin
b0fe99384ab1b23153eced48a9bbe516fb213f921a804c817c9750b224326c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 5284 bytes
font_01_sfnt_off0000dd77.bin
49a114d9b51fb39154097cc318005c8cc9fcd00980150a81500c8af86a8e631a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 10424 bytes

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