Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4870de22bed7a0d…

MALICIOUS

PDF

79.9 KB Created: 2020-08-22 15:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be3ca05667945334ce0eb84555827927 SHA-1: bdc02f267e4d710bcdadac3ca5783d1a8886b034 SHA-256: d4870de22bed7a0d2f21dd42c7fd6a5f73c49f06583c2541ba9251c50e6e6b46
150 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 'https://ttraff.cc/pify?keyword=arista+switch+configuration+guide'. This indicates the document's primary purpose is to trick the user into visiting a malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link-farming or redirection-based attack. The ML classifier also strongly flagged this PDF as malicious.

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=arista+switch+configuration+guide
    • http://koxuzob.fathersparentalrights.com/uploads/1/3/1/1/131164250/7037996.pdf
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdf
    • http://files.rylandhowardaudio.com/uploads/1/3/2/7/132740756/rewinoz.pdf
    • http://sulufuw.nscecommerce.com/uploads/1/3/1/4/131453526/debojijapuwuf_vuxukewa.pdf
    • http://files.saintstanislaus.com/uploads/1/3/1/4/131437233/jimezaxedusetupi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/sofisamawetaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/l_agriculture_intensive.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/5326411394.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/munawisor.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/56240559725.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7282/files/resumen_aparato_locomotor.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/subject_verb_agreement_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/kamoxaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/9440132299.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/49434037146.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_off0000ef80.bin
37ccab85a1a6a014ed8d4eb7c414e6f6cecbe2c24a8a853f6fb61552acd22773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 5332 bytes
font_01_sfnt_off000101a1.bin
9bd2d88652d65a49f61ce324b36e6e011f1f59102d4cabee968fbf10c89b4313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 15888 bytes

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