Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28300c4fbab0dd8…

MALICIOUS

PDF

47.0 KB Created: 2020-08-17 18:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92db2ed516d3d28bb4c7e4d46b0303af SHA-1: dce3fa7649d7b9d40fe36a5484c2ec359487e893 SHA-256: d28300c4fbab0dd874bcf7fbe2ecb9552311591256a727ba5809257855845119
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=common+core+sheets+multiplication%2528+vertical+answers', is identified as a malicious redirector. The document body itself is largely unreadable, but the presence of the malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt.

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=common+core+sheets+multiplication%2528+vertical+answers
    • http://files.remodelestimator.com/uploads/1/3/2/6/132682210/d5042cc61.pdf
    • http://files.hacktheplanet.com/uploads/1/3/2/8/132816066/warabisisafame.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/xepezor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/snapchat_hack_tool.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/5e_wild_magic_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/51659032808.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/bukhari_sharif_islamic_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/computer_beep_codes_and_their_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/79074720436.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/40058796637.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/84777263887.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ca.bin
02c7c1d554d97b8f24e5d664b44fcf100ef748f13f314ec0ffabf41c7ba41182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 5308 bytes
font_01_sfnt_off00006ab8.bin
aa54cde9e36263ecadc91b349dc61f8e54c629802f094d33dff838cbca496332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB8 1704 bytes
font_02_sfnt_off00007339.bin
f493c2fd5313b7656db73fe7616e600793e50cfa03c84b401339858b8417f84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 10432 bytes
font_03_sfnt_off00009704.bin
8cbacb05f0a52cfaa1e2a9600f4269925f74195c1ac77ce917115a2456082bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9704 16268 bytes

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