Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cd48e9a4ad3388…

MALICIOUS

PDF

43.6 KB Created: 2020-08-20 03:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 962e2876736c4f718a05eccaad83830d SHA-1: 401cee89a0fdee2877e4ea95f2395ae0c516bf25 SHA-256: e4cd48e9a4ad33883a4f7ff2f8f8e1b286c6bda860bd4b1d63763083923f4a61
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=instagram+profile+stalker+apk`. The document body, though heavily corrupted, contains text related to 'Instagram profile stalker apk', suggesting a lure to entice users to click the malicious link. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve SEO for malicious content or to distribute further payloads.

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.ru/pify?keyword=instagram+profile+stalker+apk
    • http://files.peninsulahotel.net/uploads/1/3/2/7/132740547/8960341.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/90504972618.pdf
    • https://cdn.shopify.com/s/files/1/0430/8890/4353/files/water_pollution_journal.pdf
    • https://cdn.shopify.com/s/files/1/0459/1783/1319/files/foundations_of_education_dsst_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/vuwavovaxifukujudezuxone.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/fiwafuvanowariwiwotexit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/nirelodewovoguratejegeno.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/paretudumagupitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/xuwaguzanalamomawu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/bewav.pdf
    • https://cdn.shopify.com/s/files/1/0454/2480/3998/files/fovifufenijipenuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/ribbons_down_my_back.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_off00006d26.bin
2d93101ed20d7e686ceee722f9c2aed06ee5b73b640e0089437e2d0f7731f567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D26 5220 bytes
font_01_sfnt_off00007ed6.bin
834dfdcaa9d4300213d71ddb41789aa8e13e5145b47ef207eed3818d9c3effff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 10280 bytes

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