Malicious PDF — malware analysis report

Static analysis result for SHA-256 4357b93157da6d92…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 18:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45adef5c1b6882de1e8f132a9195ca2f SHA-1: 8d28bed33591974f4b0e3ba38e3978b2439b73e9 SHA-256: 4357b93157da6d928da0b172d8685f3ea88d9d1e6f649e74cb8296df731535e6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=apostrophe+worksheets+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=apostrophe+worksheets+pdf
    • http://parole.brianboydmotorsports.com/uploads/1/3/1/0/131069839/bemojowinumo.pdf
    • http://xiralaf.whealey3md.com/uploads/1/3/0/7/130739625/66aefa48d.pdf
    • http://malemof.justgreenwellness.com/uploads/1/3/0/8/130814328/zixuxofejawe.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/7/130776462/tonafutepatod-kidowov.pdf
    • http://files.dantejericho.com/uploads/1/3/0/9/130969440/1dbc0733.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/11191993951.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4286/files/industrial_wastewater_treatment_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/kigozegovawo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/asian_games_2020_medal_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/almacenamiento_en_la_nube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/stihl_br600_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/blanche_neige_rsum.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/jinevuremotodalapewetebe.pdf
    • https://cdn.shopify.com/s/files/1/0443/0757/9036/files/britannica_download.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_off000074f7.bin
db7f3049abd92fca41e13da811410f9243a5f5a57349e8696509ae629df6c197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 5032 bytes
font_01_sfnt_off00008624.bin
8f4d6f385a1bb12efae4ea62c23009b78880e18092d19c43074a9748666bb3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 10240 bytes

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