Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa48356e8c62455b…

MALICIOUS

PDF

39.5 KB Created: 2020-08-13 18:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e7249fd3ca73d5a5debb44cdba3f2b SHA-1: a94f6120c5a7b96b9630d763138946533d5ebc08 SHA-256: fa48356e8c62455b3a4177b6b51f203180d600a335f05b224d2fbb2a08e6ebeb
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate educational resources. One of these links, 'https://ttraff.cc/wb?keyword=english%20alphabet%20phonics%20pdf', is identified as a malicious redirector. The presence of a 'Download Button' heuristic further suggests a deceptive workflow aimed at tricking the user into clicking the malicious link.

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.cc/wb?keyword=english%20alphabet%20phonics%20pdf
    • http://files.krystalwatersystems.com/uploads/1/3/0/9/130969633/4cc4e8628c1371e.pdf
    • http://files.marksoutdoors.com/uploads/1/3/2/6/132695620/9529869.pdf
    • http://files.taillacdobermans.com/uploads/1/3/2/8/132814929/mifowaxe-ronewuzezikobe-gebenivijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/change_to_word_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/vesobomor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/pezoxuxupazukexe.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/jezakojoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/gamagiweligiteje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7067/files/shl_inductive_reasoning_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/creative_writing_vk.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/conundrum_book_anuj_dhar_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/dajazizurep.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_off00005bdd.bin
6e9d645a5ec08fd7a5165e160c56ce38d31a6dbb489aa75a7866124c3959a1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDD 5420 bytes
font_01_sfnt_off00006e3a.bin
d46d913c1b13498fa4c405da433dbc63150a8dfe1a35c5c9b77ccce5312116af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3A 10256 bytes

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