Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f92a521cb597cd…

MALICIOUS

PDF

111.6 KB Created: 2020-08-18 20:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d62d54ac9ff64f79c883706206159f SHA-1: 59188f4f7fcb3dc19ed5a4c9ddef44cedaf89c5a SHA-256: a9f92a521cb597cdbb14a0b5285097c9ebc8006ce472af7849949dba304e9c89
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the lure for the malicious redirector. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=malagasy+pronunciation+guide
    • http://mosivi.battlepark-now.com/uploads/1/3/1/3/131379578/2884980.pdf
    • http://files.cpmyc.org/uploads/1/3/1/6/131606003/fb2d4772ed9.pdf
    • http://miduti.blueblazeshoops.com/uploads/1/3/1/3/131380600/26517a.pdf
    • http://rugobew.onedollarapologist.net/uploads/1/3/1/8/131856158/pikakituvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/xixizetede.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/comment_faire_une_bibliographie_d_un_document.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/11835443369.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/coming_back_to_life_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/22908026174.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/febura.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/92483323306.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/24946448959.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/71291626984.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/list_of_common_nouns_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/67803977779.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/brolly_sheets_discount_code_nz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/xegufabizexasesu.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_off000165fb.bin
1588e1a8834b35429fab91cea35b52d5dee2b5058c039737941bf91a228afd5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165FB 5348 bytes
font_01_sfnt_off0001783c.bin
9e2b8498b9eacd1d92201f89b020d843114494449dd794803284e7ffb9818cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1783C 19672 bytes

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