Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a795eb498569840…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 20:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a65ad33476ae45b6cdf475ed48d44ef3 SHA-1: 1383493dc7d5a5a7b8fa41a471e6cd3c5b49e765 SHA-256: 2a795eb498569840ec9cb25245a3fa5bcba646f877abce53ad1a11198a86b9d6
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to direct users to malicious content. The document body, though heavily obfuscated, contains the primary malicious URL and references to movie songs, suggesting a lure for users seeking entertainment content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=chakram+movie+songs+free++320kbps
    • http://semun.gasparatos-lab.org/uploads/1/3/0/7/130740178/pukewaximipaw.pdf
    • http://files.jamesneedhamart.com/uploads/1/3/0/7/130775876/risap_difedaf.pdf
    • http://dujuwipe.alr182.org/uploads/1/3/0/9/130969746/mixasim_nivaked_mameriwagevugik_xemamazozisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/saxunagemufevodedetavasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5637/files/guide_vert_michelin_belgique.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/49039188933.pdf
    • https://cdn.shopify.com/s/files/1/0440/3209/8469/files/describing_places_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/luzob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/albert_camus_l_etranger.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/microsoft_office_flyer_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/33057564366.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_off00006b90.bin
15603b7713da6f60dfdb52fedeb04e3825fa9eff12fd35a331fad21b3f45cc57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 5888 bytes
font_01_sfnt_off00007f87.bin
25a8ef59f81b87ee431f15684b04c8e39c470b30c95d38de9d53b6d40c7c1cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 14236 bytes

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