Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b170d32dfecd8fc…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 23:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f37aacf4f307e1fdffcbfb68f48eee1 SHA-1: 9229f6142f91f360fba83ca8b9aed5d2e779bdf5 SHA-256: 3b170d32dfecd8fc27cc46e538334e5569b1be152f06374092dea1558a37ade0
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or social engineering attempt. The document body, though heavily corrupted, contains text related to a medical atlas and a download lure, reinforcing the social engineering pretext. The primary malicious IOC is the redirector URL, which is used to funnel victims to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=the%20wills%20eye%20hospital%20atlas%20of%20clinical%20ophthalmology%20pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://files.mbabechuk.com/uploads/1/3/2/8/132815388/tovokejizipesoki.pdf
    • http://files.time2elevate.com/uploads/1/3/2/7/132712302/vopoxuvit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/dialectic_of_enlightenment_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/tipping_point_book_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/18871929574.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/ziwowoxapometewulipena.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/fipigenafufuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/konuxirelevumof.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/xikar.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/66714414411.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/naduvenaleletoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/96679913118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.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_off000053fe.bin
3bd7797ea1e2dd8cbac8194502f861d118f2a80b1f9fc943830c6b47c77455d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FE 3112 bytes
font_01_sfnt_off00005f17.bin
fac247dfa2106b74255faed6c6c767eaa6e909427341a73c474d27151d82c55c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5616 bytes
font_02_sfnt_off00007226.bin
b4da29ed15538403a8a4a63aa107d0a9dd844ad85734c785979123a010c88e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 10584 bytes
font_03_sfnt_off0000960d.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0x960D 16204 bytes