Malicious PDF — malware analysis report

Static analysis result for SHA-256 126c77c960fe726a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-17 00:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c8a11ff9f6ecfe4645577b604839a5 SHA-1: 3a139e3dcf2346240ba89e1a112cd17641fdd197 SHA-256: 126c77c960fe726a3aa9b3e898d26f9032e3725e037cfd2784118899db172f62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to numerous PDF files, with one primary link identified as a malicious redirector. The document body, though partially obfuscated, includes the text 'Blind sql injection manual exploitation' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector confirms the intent to lead users to harmful content.

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=blind+sql+injection+manual+exploitation
    • http://mobin.jubileecoachesrollesby.co.uk/uploads/1/3/0/7/130776394/4240429.pdf
    • http://sosop.bellafurdesigns.com/uploads/1/3/1/6/131607131/ffd295c.pdf
    • http://tibejetum.lightsourcechiropractic.com/uploads/1/3/1/3/131380504/zifarug.pdf
    • http://files.extracoolerart.com/uploads/1/3/1/4/131438038/4115645.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/66092187479.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/36334278664.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/dawuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/tratamiento_anemia_ferropenica_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/tebubaralomokami.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9925/files/9181105591.pdf
    • https://cdn.shopify.com/s/files/1/0448/5634/4737/files/ancient_mesopotamian_religion.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/tumuvoguzafatowelesusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/medical_english_vocabulary.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_off00006121.bin
fed65c041c431b118e198db979364de7a0189fee5cfa9a80908d09db03f2e8a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5444 bytes
font_01_sfnt_off0000738f.bin
ea546d326d418b23576ce9fb8f86992bf83696c69f7bd05f6750b92a3e1c7984
pdf-font-stream PDF embedded font (sfnt) at offset 0x738F 10808 bytes