Malicious PDF — malware analysis report

Static analysis result for SHA-256 147b0c194ed53af5…

MALICIOUS

PDF

34.9 KB Created: 2020-08-25 08:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3fedd45213126dad626b0eaa1985a1f SHA-1: d0ffc886a513d105c4a93e8fda19e2e031b6c74d SHA-256: 147b0c194ed53af5273042c8320aab48388f1f6a60296b7c845cb48e761ae709
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and contains a link farm with a known malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to a malicious redirector, suggesting an attempt to redirect users to malicious content. The presence of numerous embedded links, including one to a known malicious redirector, indicates a likely attempt to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bareilly+ki+barfi+movie++movierulz
    • http://luwapir.mmsoundandlighting.com/uploads/1/3/1/0/131070718/nowiwavar.pdf
    • http://gebad.alittlebirdie.co.za/uploads/1/3/0/9/130969742/5512674.pdf
    • http://files.windsorpoetryslam.com/uploads/1/3/2/7/132740253/niregakajulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/aprendiz_de_brujo_ii.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/79423250472.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/latimubimotagesesonazip.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/29197291567.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/ladadewek.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/84117653918.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/lepoguteni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/attributes_of_god_lawson.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/set_environment_variable_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/tifiwijirabemelifob.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004abd.bin
845bee055e37e9a2de0601b705d7a9ed06cbeb69e2e0f859d4ff7164e1f5f2eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABD 5200 bytes
font_01_sfnt_off00005c75.bin
307f92de3fb668ad136dfbdbb15f1d51bb30c236b7e4f3e5a2b47d5ab47cc266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C75 10100 bytes

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