Malicious PDF — malware analysis report

Static analysis result for SHA-256 3369839b7b33c09b…

MALICIOUS

PDF

47.1 KB Created: 2020-08-17 01:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27ae7e04df962d70947345bd38e36ce7 SHA-1: 1926a5d688636cd332eb03410a69010aa4eb14bd SHA-256: 3369839b7b33c09b5cd4c31a9aab0db0c4e8d448f488c8d2ef4ef3e504e27184
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=abdominal+pain+adalah+pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=abdominal+pain+adalah+pdf
    • http://ratone.all-haven.com/uploads/1/3/1/6/131606103/466053.pdf
    • http://files.healingwithjeannette.com/uploads/1/3/0/7/130776639/pekufudisoxawisax.pdf
    • http://bulovukid.thegathering4coacheswives.com/uploads/1/3/2/3/132302780/5202613.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/frightful_s_mountain_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/28011150622.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/zoboresumasabiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/77370906563.pdf
    • https://cdn.shopify.com/s/files/1/0433/7873/7302/files/catherine_millet_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/wordpress_installation_script.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/67273837430.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4037/files/litewoligesedasij.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/begokokivarevugemuwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/99908164553.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/vebenew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/24665139216.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f86.bin
a51ba82fccf324d10bb4cd88f1f06ac242214e6e0bfc7d8f3107e05f6720d001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 4728 bytes
font_01_sfnt_off00007f4c.bin
1090d30fc7bcd1b3a61e56075fe428f87f0f030c5428b3a3900399f8a37c6561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 9832 bytes
font_02_sfnt_off0000a0ec.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EC 4324 bytes

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