Malicious PDF — malware analysis report

Static analysis result for SHA-256 427e79bc1e944e2f…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 12:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a371ca1c95e9760557a7ab82b381367b SHA-1: e8ea2849824a6095252cff239bc24bac04565620 SHA-256: 427e79bc1e944e2fdd96bef5237a47e97b531cf230646719dd749be0b3e0ebe2
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external links, many hosted on Shopify. One of these links, 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdf', is identified as a potential entry point for the malicious workflow. The document body, though heavily obfuscated, contains text related to 'Computer awareness capsule' and 'bankers adda', suggesting a lure for potentially sensitive information or further malicious actions.

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.com/pify?keyword=computer+awareness+capsule+pdf+bankers+adda
    • http://files.usveteransmcma.com/uploads/1/3/2/8/132815015/mezerekuwafut_duzoriwipoko_kiliraw_koledazudoxur.pdf
    • http://files.greenmannurseries.com/uploads/1/3/1/4/131408620/fivedoje.pdf
    • http://files.olgaklosowski.com/uploads/1/3/0/8/130813714/rinezi.pdf
    • http://files.usveteransmcma.com/uploads/1/3/2/8/132815015/mezerekuwafut_duzoriwipoko_k
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/ruzade.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/39065311820.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/boxujevabukipipirufogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/kifujegolavanovowukowizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/530429926.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/7303046015.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/pugawivekakurizeres.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/22606701366.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/15805195770.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/tadilomifasasudaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/xusalolakoliluwula.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/fowajijer.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_off00007297.bin
a6567503236453fc6196c6009a6ce51fa709ad8a86b4eae4b03b4e9bebc09be8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 5456 bytes
font_01_sfnt_off0000851c.bin
3d821ebda3b03f96e3b6c645b47c51d19f3a41faa0612cbfbf323db1d81ac4f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x851C 10196 bytes