Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f60db35f6d74fa…

MALICIOUS

PDF

35.8 KB Created: 2020-08-24 11:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91dc5a5ed421be8e296d86494239136b SHA-1: d211fe5aacc19f364155635f47f0579d6bc99bad SHA-256: 81f60db35f6d74fae8ee149b54d1f3690ac4a700bf62e2f1a329d8adaf2390e3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=handwriting+worksheets+for+kindergarten+blank'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains text related to 'handwriting worksheets for kindergarten blank', likely a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking the malicious link, which then redirects them to harmful content.

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=handwriting+worksheets+for+kindergarten+blank
    • http://files.myperformance.co.nz/uploads/1/3/0/7/130739142/timazuguwabeje.pdf
    • http://files.rolexandjewelry.com/uploads/1/3/1/0/131070080/foralo-busiten-davepigimulu-rusam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/weneb.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/domino_s_pizza_menu_card.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/75386999411.pdf
    • https://cdn.shopify.com/s/files/1/0440/8757/4678/files/30210973076.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/ribajazebadupinoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/caller_name_and_location_tracker.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8735/files/60045232738.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/23077950277.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/51208704295.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/lilokugozoburasag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/a_level_chemistry_e_n_ramsden.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/mozovamepe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/3887251422.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_off00004ed6.bin
2a7f1ea8d160975bf17f3a604029c816b65f182413db5362b1487613e6e2fce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED6 5424 bytes
font_01_sfnt_off00006151.bin
86b51644af69a2218afa211faf485ecb604b2e717e6e826ad2f30c9ed599c892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6151 9628 bytes

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