Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c211b1d1d0db1e8…

MALICIOUS

PDF

45.2 KB Created: 2020-07-31 04:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094d5e4157a76b93f3e79886268b1bbf SHA-1: 6f8f9ecacadb186aaea24db58c04c5b97d64607d SHA-256: 6c211b1d1d0db1e8912332810d62f1f846f081c7f21ed489ba06b7ccb8fdf396
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'biology form 4 chapter 7 notes pdf', likely to entice users to click the embedded links.

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=biology+form+4+chapter+7+notes+pdf
    • http://files.readtransformmedia.com/uploads/1/3/0/8/130813528/f1aea8.pdf
    • http://files.davisvilledetailing.com/uploads/1/3/2/7/132741482/31709d8834.pdf
    • http://files.the-regular.com/uploads/1/3/1/6/131637839/kisoriromudegiri.pdf
    • http://files.canyonsohana.com/uploads/1/3/2/3/132303320/tusadikitupoxekumon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/venijinopakidot.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/gebabidod.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/vovazinesubudapab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/67958326116.pdf
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/1923673587.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/24329949756.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/zapabulusurogiroged.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/tugugizubig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/18894534371.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/dipakujokokoxixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/jazolokodepomubovijofe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/pukigimogobuvutupavomiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/38483721344.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007237.bin
30129390ff4adef9036de46ceaeb7523011ca269cd0303c8b8e95a9564d6e431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 5676 bytes
font_01_sfnt_off0000856b.bin
00ba16a86befc23595d2745aca6f098e11e3944eca224d5c5c052467437d4ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856B 10384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.