Malicious PDF — malware analysis report

Static analysis result for SHA-256 df159db8cd68952c…

MALICIOUS

PDF

33.6 KB Created: 2020-08-16 11:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4604f39d13ebeab703942791c207efc SHA-1: a95138126c8ed1f7c20352297820242d52d56417 SHA-256: df159db8cd68952cae5bf20ca8c983e483be6d3f6ec4ce17b1d2a1fae82447f9
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a coursebook download. The heuristic firings indicate the PDF is designed to link to known malicious infrastructure and functions as a link farm. The primary malicious IOC is the ttraff.com URL, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cambridge+igcse+computer+studies+coursebook+pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://tisub.lightindarknessohr.org/uploads/1/3/1/6/131636755/4f5cba8d.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/vifejuroxoxopugubod.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/viwutelaxepazoli.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1979/files/3_ways_to_read_a_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/siwosasafip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/malamevodeki.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/savoloruwigidemegezafez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/agama_islam_kelas_12.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/491687494.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_off00004527.bin
0bc42c425052c4ca486bae86e06efaff8853769a6dc04d5f828327d2310b51eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4527 5552 bytes
font_01_sfnt_off000057f9.bin
60e4b50c13d73d23f338e4ed8ac4d2ca1d15c0695be7ca41743e5afd894ef072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F9 9920 bytes

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