Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8358212bb053ca8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 22:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 702326ecb0adcde6238788cea52b16a9 SHA-1: 9318bcbc1ed1c4720359e7cfb519325e6d82c907 SHA-256: c8358212bb053ca8c6b8bf776657ff0c6a373e1d57e6a19d70b269323770f563
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, redirects through ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'secure vpn free for windows 8', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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=secure+vpn+free++for+windows+8
    • http://files.kingdomestablishmentministries.net/uploads/1/3/1/1/131163859/726128.pdf
    • http://files.tonkabaynewfs.com/uploads/1/3/1/1/131164425/nuzat_winufivaru_wigokalo_migamuni.pdf
    • http://files.beyondpromarketing.com/uploads/1/3/1/4/131407111/xomebomiwejawa.pdf
    • http://xekiwatos.hifiaddiction.co.uk/uploads/1/3/1/1/131163927/5b82c4.pdf
    • http://files.theirisproject.net/uploads/1/3/1/1/131164260/1006614.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/gmail_is_slow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/38611926486.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/burabulujixexifomed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/12460842801.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/application_form_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/memawevipibuwosis.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/zatodavinisinesefidoben.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/76047532947.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6101/files/misij.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/18030954156.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6217/files/44209626311.pdf
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/convert_into_word_document_online.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_off000077a6.bin
7deaff472a39390288892ca0c280fa362a42c86e710cca551bb0eabe0612a554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 5356 bytes
font_01_sfnt_off00008a08.bin
4f5e9836648ee0631c767c38fd5c78cbc687d45a5dcd580ab4148e141f5d9f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 10152 bytes

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