Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b7ce57eb843cc0…

MALICIOUS

PDF

50.2 KB Created: 2020-08-16 23:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ad070f732cc21b94bc8f9a80a18b72 SHA-1: 68705f886cbf76ec509e4a85f9efdf2402edf59c SHA-256: 55b7ce57eb843cc0f30828906c0d3da87adebc49c6e078350b5954b5c4875c20
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by a PDF link farm heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a call-to-action for downloading 'bejeweled 3 free full version unlimited'. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bejeweled+3+free++full+version+unlimited
    • http://dababub.ascapatras.org/uploads/1/3/0/7/130775413/razitenu.pdf
    • http://larij.firststagela.org/uploads/1/3/2/8/132814930/5255193.pdf
    • http://duwopukuj.fcstnebraska.com/uploads/1/3/2/7/132740214/3186843.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/medical_terminology_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/candle_making_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/pupigivedixagubadebetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/39088750941.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/rijanufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/femexuvukusujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/60544896249.pdf
    • https://cdn.shopify.com/s/files/1/0439/2386/5768/files/xavesiwigukusewile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/83966484490.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/bescherelle_chronologie_de_l_histoire_de_france.pdf
    • https://cdn.shopify.com/s/files/1/0432/7633/7318/files/tafurajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/tupigaxolatopujiluro.pdf
    • https://cdn.shopify.com/s/files/1/0444/3809/3990/files/easy_origami_bookmark.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_off00008688.bin
2aac74a7e6e2f77390b440fe0ea618347d1625cde23dd69f2f8fa5d80b080646
pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 5284 bytes
font_01_sfnt_off0000988a.bin
d9a989bf28a0bbe932ad4d0159e929cb3da392cb6065ab142a04dd017715ae6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x988A 10204 bytes