Malicious PDF — malware analysis report

Static analysis result for SHA-256 be57ddc17ecc6cc7…

MALICIOUS

PDF

33.2 KB Created: 2020-08-01 04:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20c0e5024c1c4e29904c9b2d90ce6c5 SHA-1: cc54980cc9af5d9264862e1993f0046d55ecfa98 SHA-256: be57ddc17ecc6cc7b1a8c9e2d08739a148158bb48ea20c0c4444262c1773f98f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=learning+java+through+alice+3+pdf'. This indicates a phishing or social engineering attempt, likely to lead the user to malicious content or a further exploit. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for the malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=learning+java+through+alice+3+pdf
    • http://files.vtfbla.org/uploads/1/3/2/6/132681294/bunupakagejow-lemofuxexorurax.pdf
    • http://files.fullspectrumdoulacircle.com/uploads/1/3/2/6/132681033/3784977.pdf
    • http://files.bbpregistry.com/uploads/1/3/1/3/131398036/busasosu.pdf
    • http://files.melissahamiltonphotography.com/uploads/1/3/1/4/131406800/5260777.pdf
    • https://cdn.shopify.com/s/files/1/0435/7101/9935/files/18693948078.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/55715294435.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/55207042436.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/vavub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/68830554441.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/68371983072.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/potolemojobotugikoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/bomewowelivomapoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/77354863173.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/56067390832.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/30153867764.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_off00004522.bin
da6822ee917d0a316a16f4365cdb5aa657eed81f42e93964d66a89dadd68aa45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4522 5480 bytes
font_01_sfnt_off000057da.bin
775711edc83d5fde09348c546991e8fe1a4dbafd53f926c3b1eac78c96fc7d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DA 9432 bytes

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