Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e20dd21e2c3da3a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-16 18:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24451b7f2f9312460992a6ea97a92546 SHA-1: 3db305105e4357acb8a8d0477b16878a4a5283e2 SHA-256: 8e20dd21e2c3da3a307dc16b73471ca94fcaabdb1a4679efa4a99c346c596aa5
130 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify, designed to appear as a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely the initial stage of a phishing or malware delivery chain. The document body contains text related to 'Bluestacks software free latest version' and a call-to-action phrase, further supporting a lure-based attack pattern.

Heuristics 4

  • 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
  • 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=bluestacks+software+free++latest+version
    • http://files.keyinmigration.com.au/uploads/1/3/2/6/132695513/senoxipa-vilegevujiko-kopofew-kepanigile.pdf
    • https://cdn.shopify.com/s/files/1/0433/2234/3577/files/queen_loft_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/nejafototisapufes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/bioterio_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/oxford_phonics_world_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/98444870510.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/32551263199.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8368/files/binary_search_tree_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/12_articles_of_faith.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/15106088499.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/delete_youtube_playlist.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_off00007322.bin
a7a543506bb8eaa8932aa357fb8fc5ac464a8987124bebe1bd3d3c35aea6019e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7322 5140 bytes
font_01_sfnt_off000084c1.bin
1aa145d4cfdfd88358f8de42c626fc76947a733f8309200f8b1ad68f9b6eb65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C1 11820 bytes

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