Malicious PDF — malware analysis report

Static analysis result for SHA-256 054a150548c4df5e…

MALICIOUS

PDF

48.5 KB Created: 2020-08-14 23:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60e8f50d799c0efd0753265ae39d74c5 SHA-1: 072e7213c5030da176ebbae57248491fb9796598 SHA-256: 054a150548c4df5e48dce80b856f33168c6b4691c234b9fcb1e989b5244cc7ea
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie download, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous links, many pointing to benign Shopify domains but one to a known malicious redirector, supports this. The document body itself is heavily obfuscated but contains the malicious URL.

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.
  • 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
  • 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.cc/pify?keyword=hd+bollywood+movies+free++2019
    • http://files.jerryschemmel.com/uploads/1/3/0/8/130814121/fudosimusekapa-korenodazopi.pdf
    • http://fifumeb.mrmanoharan.com/uploads/1/3/0/7/130775734/8624690.pdf
    • http://files.anniehoff.com/uploads/1/3/1/4/131437677/xutudulo.pdf
    • http://files.erniedavisscholarship.org/uploads/1/3/1/3/131383825/gokarafexib-vowoj-tirifal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/begakuwiwimefokiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5526/files/exercices_etre_et_avoir_au_futur.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/49124570891.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/jevazoxupibodezas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/ziluzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/74109023771.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/sucrose_gradient_centrifugation_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/kupamutabedolaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/wobosebaritup.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/guvolatoxapumabalozoxoje.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/lemavaxob.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_off00007c52.bin
04534611b90b5ba377a13573b77bca8641685dd1020ef571e21649d019f9edc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 5680 bytes
font_01_sfnt_off00008fac.bin
748889ea759674b210a8dcca1ec51040e0d0ef58f7783c7d015b314a8da6b7f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 10932 bytes

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