Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6a92db896bdca1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-12 00:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46b05e23817599a27ebc381b1006f523 SHA-1: b541d9b091e48a095b36095d147e14794c7a4de8 SHA-256: bc6a92db896bdca124ace883d70aed77e4f64811034954096cc93cf643bd576a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.cc, which is used to redirect users to other potentially harmful sites. The document body itself is heavily obfuscated and contains a mix of text and what appears to be encoded data, along with multiple URLs.

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=alessandro+baricco+selyem+pdf
    • http://files.alexferguson.co/uploads/1/3/1/4/131453429/vefas.pdf
    • http://files.salemuccgilbertpa.com/uploads/1/3/2/6/132681698/sowogevopo-dowubizexadowe.pdf
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • https://cdn.shopify.com/s/files/1/0435/0345/2326/files/biochemical_engineering_and_biotechnology_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/siturikunawifozununox.pdf
    • https://cdn.shopify.com/s/files/1/0440/3298/3205/files/catalizador_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/13967764790.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/1021._remove_outermost_parentheses_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/canadian_passport_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/t._i._live_your_life_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/0462/3010/files/90497428846.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/94241492387.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7048/files/42687096305.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/yoga_for_weight_loss.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_off00005dd6.bin
ba839960f564eaf14f2177bb33847ba710527222022b82097a1abb5b6934e79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 5532 bytes
font_01_sfnt_off00007085.bin
53cf8f0ef8a3e79ce203b2ae065557484969e145a62eaccf84b37ec87c3550a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 10772 bytes

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