Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a74606df7b990f…

MALICIOUS

PDF

60.9 KB Created: 2020-07-25 03:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d14012199633187c5937e434d66c81 SHA-1: c99ca8666a1cb07fa97039e7d111dd90330368f0 SHA-256: 11a74606df7b990f39054640f17b714ef036f2c1db54bdc14b3af3dc8774a0d1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains keywords related to movie downloads and urgency, suggesting a lure to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=commando+2013+movie++400mb
    • http://files.kingstonwestdental.ca/uploads/1/3/0/7/130738596/aa41de0f.pdf
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://files.lauramorrisonwrites.com/uploads/1/3/2/7/132741476/2321461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nijasanito.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/wivuvuzalapomubil.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/33349080783.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/vubewudox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdf
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/47478204639.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/57925816362.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/88387429970.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/23984865118.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/94099816927.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdf
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/42677687507.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/78362055705.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009be7.bin
0abdd6010d601d0b5b57a6f023ae433387924ac40c6329e8ddd30bab134c5061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE7 5172 bytes
font_01_sfnt_off0000ad6f.bin
83dd3cc6ac6139aaa67a7dcb73f593c70f04eec8ce83c9a3a59c9d1e91ccb090		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 10280 bytes
font_02_sfnt_off0000d0e3.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 16164 bytes

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