Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d3ff4f79d2dd7a…

MALICIOUS

PDF

50.1 KB Created: 2020-08-10 01:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ec9df6b5d78ecdf4e5a1cac5528824 SHA-1: be3f2697725a1cd8f4b0737087c234bcb3662228 SHA-256: e2d3ff4f79d2dd7a6d0cc2ded08e22d340845540763bf06ffe49d763e865868a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm technique used to obscure the final malicious destination, likely for phishing or malware distribution. The document body text, though partially corrupted, includes keywords related to academic worksheets, indicating a lure to entice users to click the malicious links.

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=translation+reflection+rotation+worksheet+pdf+grade+4
    • http://files.commitmentcounselling.com/uploads/1/3/0/8/130874160/13f0deaf9b2c.pdf
    • http://rirev.evansmstheatre.com/uploads/1/3/0/8/130874493/8f9a87e039de2d9.pdf
    • http://files.thaifoodtogoonline.com/uploads/1/3/2/6/132695476/filasudebumof_rupolumi_lilikavabuni_sopitafizofok.pdf
    • http://ninegi.danamarvel.com/uploads/1/3/1/8/131856333/kiwalofo_wanefatasitol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/academic_achievement_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/biblia_latinoamericana_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/13022152559.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/raag_bhairavi_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdf
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/mivuxoxud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/blue_oyster_cult_agents_of_fortune.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/88510824430.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/97303157956.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/digabiwasude.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_off00008533.bin
7ef23703a98b77f5246bfce4a025a9148b01525cfb42d4e4c3241c85d5a695fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 5608 bytes
font_01_sfnt_off00009857.bin
ffc2a788c3ca4e1cac08fbf76c381e66a8d22cd318b7eb69b8231caea3e9e14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9857 10216 bytes

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