Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f48709febd27b0a…

MALICIOUS

PDF

54.4 KB Created: 2020-08-05 01:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9dcbea885c2c6f95622334315632511 SHA-1: 3c66ee009fc26bcdf07243aef591525e1953f42a SHA-256: 6f48709febd27b0ad2594c3ea9be9651d60107cdd09a3c71281b04de3982efff
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the file is designed to lead users to harmful content, likely for phishing or malware distribution.

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=andreas+moritz+ksiazki+pdf
    • http://files.layover-tour-beijing.com/uploads/1/3/1/3/131379919/devisodegi.pdf
    • http://files.dynamicnz.co.nz/uploads/1/3/0/7/130776088/5f4cc25959b.pdf
    • http://files.janetfergusonauthor.com/uploads/1/3/2/6/132681440/lorimipozizo-gofuxawapeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/22949963245.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/wewozixesatunozavemuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/posolozatudujodiwiped.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/fewipote.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/13474026493.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/juvugaseximere.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/56006897989.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/2017622384.pdf
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/dekoporakijunave.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/jinefijurotarojidababeteg.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_off00009762.bin
5c6d9a197569dde3150672308e1aeb80d37153ae451f35c9c16fa68413b32099
pdf-font-stream PDF embedded font (sfnt) at offset 0x9762 5256 bytes
font_01_sfnt_off0000a939.bin
eea520cbb71dbb5b4b70fcbda5fd70856916deb090bb414e527e0a6401446374
pdf-font-stream PDF embedded font (sfnt) at offset 0xA939 10444 bytes