Malicious PDF — malware analysis report

Static analysis result for SHA-256 8517d8e5d7a06a9b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 11:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2730cb162160d45e6262825e95b56a5 SHA-1: de35b8afc9a9447a67ab335a012b47815737b657 SHA-256: 8517d8e5d7a06a9bbb162eaab1f12fbc4522419fbddb445eb14fd48c7d2ae6f9
128 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a technique often used to create SEO link farms. One of the primary links directs to a known malicious redirector at 'ttraff.ru', which is configured with a keyword related to 'imo messenger app'. This suggests a phishing or malware distribution lure. The document body itself is heavily obfuscated but contains the same URLs found in the heuristics.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=imo+messenger+app+android+free
    • http://files.hoosiernaturopath.org/uploads/1/3/0/7/130739949/gifamefibumad.pdf
    • http://jujebiv.helpmeimgettingmarried.com/uploads/1/3/0/7/130776445/rujusasukewajeweriwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/gumeluvepitugotebofuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/amadou_bamba.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/80117793416.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/womaloxiwinu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/championship_manager_2010_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/angioma_cavernoso_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/33953272813.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/windows_10_enterprise_1803_iso_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0429/9060/0355/files/xewemolaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/bomixamexusodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/apache_cassandra_upgrade_guide.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_off00006913.bin
e5a61ce4de9a8df6e90efdb9c8db8c93098f0b6ddb4076f5515e2035e78b80db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6913 5268 bytes
font_01_sfnt_off00007ae4.bin
1e8f5781ef19b2f20061b769945b71c884d9d1f8bc214568570846f714cc01c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 10216 bytes

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