Malicious PDF — malware analysis report

Static analysis result for SHA-256 6317fb47687499b1…

MALICIOUS

PDF

40.1 KB Created: 2020-08-06 19:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a834ed60f110deedf1ee3bc9ed28ad SHA-1: 01e8e08e9ce575017b1149dad8093c4e17f80d1f SHA-256: 6317fb47687499b1f376a738586a3fd2fe003ebad4e91415d000241b3294273b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the same malicious URL. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=genetic+disorders+articles+pdf
    • http://files.simplyskinandbody.com/uploads/1/3/1/4/131438471/dulixuzom_lojokidoda_fivoxovano.pdf
    • http://zuvukufot.southamptonisoc.org/uploads/1/3/1/3/131379578/9753008.pdf
    • http://files.sycamoregrovephotography.com/uploads/1/3/1/3/131384432/428fbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/sharepoint_browser_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/15505828730.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/pezapupalex.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/7033566380.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/moxixegorimupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/pepim.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/jonojesixetebi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/nazozutukozupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/37625762688.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/43472041042.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/raxidowobuwi.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_off00005eff.bin
10755ecb20e80e87c57833e2c5c482a0002bf1fd4b34f116ec489d46bf93b1b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 5180 bytes
font_01_sfnt_off000070b3.bin
76a266aae69b2a48adc46ac3f72e5808647ae8d77160f298722137ef2cd9a6c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10308 bytes