Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c7d6fa8018177a…

MALICIOUS

PDF

37.8 KB Created: 2020-07-30 13:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4115789a571a2eeb96db863aaf604118 SHA-1: 9ea93df52d61dfde5d1fd677c4c6fb8b6531f97d SHA-256: f5c7d6fa8018177acf8858bef25be485ad6cdc009c152aae6d89acc99a9398e2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented to the user as a link to an academic writing PDF. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.com/pify?keyword=introduction+to+academic+writing+pdf+longman
    • http://files.joelwinfinefoods.com/uploads/1/3/0/9/130969960/2112517.pdf
    • http://files.dukechoir.org/uploads/1/3/1/3/131379037/kinubotuzavare-serure.pdf
    • http://files.kathleenmoranart.com/uploads/1/3/1/0/131070374/kufelewekusapajelop.pdf
    • http://files.cafe643.com.au/uploads/1/3/1/4/131406506/4774588.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/gefejamovud.pdf
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/40269994879.pdf
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/zivaselazumesek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/21353668948.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0759/files/lebofokuwonoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/2649319773.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/nujetisisenigadegasoroti.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/roxidimazawisinabifixebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/jebizavikufukijojoxedig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/bivobawuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/kuwemozizoniruf.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_off0000582d.bin
a52fd1214d54937d58885d2a06adc2b447c5062052accea727b0c950e843da00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582D 5208 bytes
font_01_sfnt_off000069db.bin
b5e64b4c4c91303b3d132cc1bc188beca4bc9f762d2746cfadb538c97ebef478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DB 9428 bytes

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